An overview of Random Breath Testing Operations in ... · 2.1 RBT Operations Statewide 1 2.2 RBT in...

AN OVERVIEW OFRANDOM BREATH TESTING

OPERATIONSIN VICTORIA 1989-1991

by

GLENN SULLlV AN

ANTONIETTA CAVALLO

ALAN DRUMMOND

October 1992

Report No. 40

glendaStamp

MONASH UNIVERSITY ACCIDENT RESEARCH CENTREREPORT DOCUMENTATION PAGE

Report No.40

Report DateOctober 1992

ISBN0732600405

Pages21

Title and sub-title:

An overview of Random Breath Testing Operations in Victoria 1989-1991.

Author(s):

Sullivan, G.Cavallo, A.

Drummond, A.E.

Sponsoring Organisation:

Transport Accident Commission222 Exhibition StreetMelbourne VIC 3000

Abstract:

Type of Report & Period Covered:

GENERAL, 1989-1991

Towards the end of 1989 the Victoria police took deliveryof13 highly visible, purpose-built buses fromwhich to conduct RBT operations. Prior to that testing had been primarily car-based. Operational datafrom the initiative have been made available to monitor the changes in police operations as the initiativeevolved. RBT operational data from July 1989 to June 1991, covering the period where buses wereintroduced, have been used to monitor these changes.

The main change in RBT activity over the two years was the increased usage of buses and the resultantdecrease in car-based testing. In the metropolitan area the change to buses was almost immediate whilethe introduction of buses to rural Victoria was much slower and varied across police districts.

The introduction of buses has led to increases in the number ofRBT tests and gradual, but relativelysmaller, increases in the total number of hours of RBT operations and session duration in themetropolitan area. In the rural areas the number of tests and duration ofRBT sessions have, until early1991, remained relatively constant. The number of hours spent testing in rural areas has varied overtime.

The main change due to the introduction of buses for the purpose ofRBT has been a large increase in

the number of people tested for only small changes in the total time spent testing.

KeyWords:(IRRD except when marked*)

evaluation (assessment), collision,road trauma, enforcement,Blood Alcohol Content, alcohol *,drink driving *, Random Breath Testing*

Disclaimer:

This report is disseminated in the interests ofinformation exchange. The views expressed arethose of the authors, and not necessarily those ofMonash University.

Reproduction of this page is authorised.

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS ... 111

Contents

ACKNOWLEDGEMENTS VII

EXECUTIVE SUMMARy IX

1.0 INTRODUCTION 1

2.0 RBT INITIATIVE - OPERATIONAL DATA 1

2.1 RBT Operations Statewide 1

2.2 RBT in Metropolitan and Rural Victoria 3

2.2.1 Hours of RBT testing 32.2.2 Number of RBT tests 3

2.2.3 Car and bus-based RBT operations .42.2.4 RBT session duration 72.2.5 Start/end times ofRBT sessions 12

2.2.6 RBT by day of week 162.2.7 PBT 172.2.8 Hit rates 17

2.3 RBT in Police Districts 19

2.3.1 Hours spent RBT testing and numbers of tests conducted 192.3.2 Car and bus-based operations 20

2.4 Summary of RBT Operations 21

REFERENCES 21

Appendix A Location of Metropolitan and rural police districts

Appendix B RBT Operations in Police Districts

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS ... V

Acknowledgements

This analysis of Random Breath Testing operations was madepossible by the provision of data by

Victoria Police staff of the Traffic Alcohol Section.

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS ... VU

EXECUTIVE SUMMARY

Since its inception in 1976, random breath testing (RBT) operations had been

primarily car-based. As part ofthe RBT Initiative (commencing towards the end

of 1989), the Victoria Police took progressive delivery of 13 highly visible,

purpose built buses from which to conduct RBT operations. Operational data

from the initiative have been made available to monitor the changes in police

operations as the initiative evolved. RBT operational data from July 1989 to June

1991, covering the period where buses were introduced, have been used tomonitor these changes.

The main change in RBT activity over the two years was the increased usage ofbuses and the resultant decrease in car-based testing. In the metropolitan area thechange to buses was almost immediate while the introduction of buses to ruralVictoria was much slower and varied across police districts.

The introduction of buses has led to increases in the number of RBT tests and

gradual, but relatively smaller, increases in the total number of hours of RBToperations and session duration in the metropolitan area. In the rural areas thenumber of tests and duration of RBT sessions have, until early 1991, remainedrelatively constant. The number of hours spent testing in rural areas has variedover time.

The main change due to the introduction of buses for the purpose ofRBT has beena large increase in the number of people tested for only small changes in the totaltime spent testing.

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS •.. IX

1.0 INTRODUCTION

Random Breath Testing (RBT) originally was introduced to Victoria in 1976 and involved

random breath testing drivers, for alcohol levels, from police cars. Towards the end of 1989

the Victoria police began to use highly visible, purpose-built buses from which to conduct RBT

operations. Previously testing was primarily car-based, although four Toyota Coaster buseswere also used. Operational data from July 1989 to June 1991 was made available to monitor

the changes brought about by the introduction of bus-based RHT testing.

The RHT initiative has been evaluated to determine the effect the program has had on road

accidents (Drummond, Sullivan & Cavallo, 1992; Cameron, Cavallo & Sullivan, 1992;Cavallo & Cameron, 1992). The operational data was essential to understand the exact natureof the program and to undertake the post-hoc quasi-experimental evaluation.

The extensive analysis of operational data also provides feedback to the agencies implementing

the initiative. This report provides a summary of RBT operations with graphical representa-tions of the data.

2.0 RBT INITIATIVE - OPERATIONAL DATA

An examination of the characteristics of RBT and a description of its operation in the periodfrom July 1989 to June 1991 for different areas in Victoria was undertaken to assist theevaluation of its effectiveness. The characteristics available for examination were:

• the number of hours of testing;

• the number of tests conducted;

• the ratio of bus-based and car-based RBT;

• session duration;

• time of day and day of week of operation; and

• the number of drivers detected with a positive reading.

2.1 RBT Operations Statewide

Information regarding RBT and preliminary breath testing (PBT) operations in each policedistrict in Victoria was obtained for the two year period from July 1989 to June 1991. PBToperations involve mobile intercepts and tests of drivers involved in crashes.

Between July 1989 to June 1991 there were:

17,625 RBT sessions

over 23,000 hours ofRBT testing

almost 1.8 million RBT tests

The number of RBT tests steadily increased over the two years while, at the same time, PBTtesting appeared to decrease somewhat after 1989 (Figure 2.1).

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS ...

Figure 2.1 RBT & PBT Tests

I_RBT OPBT I

300000

275000250000225000200000T 175000eS 150000ts 125000

1000007500050000250000July

Qet

to

to

Sep

Dee

'89'89

Janto

Mar

'90

Aprilto

June

'90

Julyto

Sep'90

Qct

to

Dee

'90

Jan

toMar

'91

Aprilto

June

'91

In contrast, hours of testing overall remained relatively constant, apart from increases when the

RBT initiative was first introduced (last quarter 1989) and at the beginning of 1991 (Figure

2.2).

The number of RBT tests conducted in Victoria since 1977 progressively increased over timewith a substantial increase from around 1;2 million tests in 1989 to over 900,000 in 1990 and 1.1million in 1991 as a result of the initiative.

Figure 2.2 RBT: Hours of Testing

4500

400035003000H

o 2500ur 2000s1500

10005000July

Qetto

toSep

Dec'89

'89

Janto

Mar'90

Aprilto

June'90

Julyto

Sep'90

Qctto

Dec'90

Janto

Mar'91

Aprilto

June'91

2 MONASH UNIVERSITY ACCIDENT RESEARCH CENTRE

2.2 RBT in Metropolitan and Rural Victoria

In this study the metropolitan area is defined as police districts A to J, whilst remaining police

districts (K to Q) constitute rural areas. Maps of areas of the State which make up themetropolitan and rural police districts appear in Appendix A.

2.2.1 Hours of RBT testing

Overall, the total number of hours ofRBT testing was greater in rural Victoria (14,000 hours)than in the Melbourne metropolitan area (9,000 hours) over the two years. However, in the

metropolitan area hours of testing gradually increased to a level of around 480 hours per month

by 1991, whilst in the rural area, the number of hours spent testing was more variable,

decreasing throughout most of 1990. There were intensified efforts in rural Victoria in January

and March 1991 however, with over 1000 hours of testing in each month (Figure 2.3).

Figure 2.3 RBT - Monthly Number of Hours of Testing

1-- Metropolitan - Rest of State I1200

1000

,800

Hou 600rs

400

200

o

J A SON D J F M A M J J A SON D J F M A M J

1989 1990 1991

2.2.2 NumberofRBTtests

Overall, the metropolitan area had a much greater number of tests (1.2 million tests) than therural area (~million tests). The number of persons tested in the metropolitan area generallyincreased (to about 70,000 tests per month) while the numbers tested in the rural area remainedsteady at around 20,000 tests per month (Figure 2.4).


Figure 2.4 RBT - Monthly Number of Persons Tested

1--- Metropolitan - Rest of State I80000

70000

P 60000er550000on

5 40000

Te5 30000te

d 20000

10000

o

J A SON 0 J F M A M J J A SON 0 J F M A M J

1989 1990 1991

2.2.3 Car and bus-based RBT operations

In late 1989, 13 new buses were purchased and fitted for the purpose of conducting RBT tests.The main differences between bus and car-based RBT testing is that there are more police

personnel operating each bus and the capacity for RBT testing is therefore increased.Calculations for the two year period show that bus-based RBT operations more than doubledthe testing rate of car-based RBT operations in both the metropolitan (154 tests per hour frombuses and 70 tests per hour from cars) and rural areas (89 tests per hour from buses and 31 testsper hour from cars).

There was a steady increase in both the proportion of RBT tests conducted and hours spenttesting out of buses. RBT testing in the metropolitan area shifted from being primarily car-based (80 to 90% of hours between July-September 1989) to almost completely bus-based,with cars accounting for less than 10% of hours, by September 1990 (Figures 2.5 and 2.6). Inthe metropolitan area bus-based RBT was the primary form of RBT operation since November1989 in terms of both hours of testing and number of tests conducted.


100%

80%

60%

40%

20%

0%

Figure 2.5 Metropolitan RBT Tests

'_car o Sus

J A SON D J F M A M J J A SON D

1989 1990

Figure 2.6 Metropolitan RBT Hours

I_car o Sus

F M A M J

1991

100%

80%

60%

40%

20%

0%

J A SON D1989

F M A M J J A SON 01990

F M A M

1991


In contrast, RBT testing in the rural area changed from being almost completely car-based to

a level in which cars accounted for about 60% ofRBT hours by June 1991 (Figures 2.7 and 2.8).The trend of shifting towards buses in the rural area appeared to be continuing at the end of thetwo years.

Figure 2.7 Rural RBT Tests

I_car o Sus

J A SON D

1989

F M A M J

1990

A SON D F M A M J

1991

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

Figure 2.8 Rural RBT Hours

I_ear o Sus


1989 1990 1991


2.2.4 RBT session duration

RBT session duration in the metropolitan area: There was an increase in session duration

over the two year time period as shown by the shifting distribution (Figures 2.9 to 2.12) and also

the average durations (Figure 2.13) for six monthly periods. In the period from July to

December 1989 the majority of sessions were under I hour in duration. The number of longer

sessions increased over time, with the majority of sessions lasting from I% to 3 hours and also

greater than 5 hours by mid-1990 and 1991. This trend was consistent with the gradual increase

in hours of operation over time and the number of sessions remaining relatively constant.

Figure 2.9 Metropolitan Session Duration Jut to Dee 1989

250

200

Se 15055ion 1005

50

0

1 to

161031 to4610611076109110106121151181211241271>

15

304560759010510latolatoto10300

mins

minsminsminsminsminsmins120150180210240270300mins

mins

minsminsminsminsminsmins

Figure 2.10 Metropolitan Session Duration Jan to Jun 1990

250

200

Se 15055Ion 1005

50

0

110

161031104610611076109110106121151181211241271

15

3045607590105tolato101010to300

mins


mins


AN OVERVIEW OF RANDOM BREATII TESTING OPERATIONS ... 7

Figure 2.11 Metropolitan Session Duration Jul to Dee 1990

250

200

5e 150ssio

n 100s

50

0

110

16to31 to46 to61 to76 to91 to106121151181211241271>

15

3045607590105tototototototo300

mins


mins


Figure 2.12 Metropolitan Session Duration Jan to Jun 1991

250

200

5e 150ssIon 100s

50

0

110

161031 to46 to61 to76 to91 to10612115118121124127115

3045607590105tototototototo300mins

minsminsminsminsminsmins120150180210240270300minsmins



, I

Figure 2.13 Metropolitan Area Mean Session Duration

180

160

140

120

M

I 100nute 80

5

60

40

20

o

Jut to Dec '89 Jan to Jun '90 Jul to Dec '90 Jan to Jun '91

RBT session duration in the rural area: Session duration did not change greatly (Figures2.14 to 2.17). The vast majority of sessions in rural Victoria were less than I hour in duration,although, in the first half of 1991 there was an increase in the number of sessions greater thanfive hours in duration. The average session duration decreased until the first half of 1991(Figure 2.18).

Figure 2.14 Rural Session Duration Jut to Dec 1989

1200

1000

800

S ess600I 0ns 400

200

o

1 to 16 to31 to46 le'31 to7'.3 t815

3D45

mms

rTllnSmi;,S '''IriS'T1:ns

Figure 2.15 Rural Session Duration Jan to Jun 1990

1200

1000800

S ess 600I0ns 400

200

0

1 to

16to31 to46 to61 to76 to91 to106121151181211241271>

15

3045607590105tototototototo300

mins


mins


Figure 2.16 Rural Session Duration Jul to Dee 1990

1200

1000

800S e55

600I 0n5 400

200

0

1 to

16to31 to46 to61 to76 to91 to10612115118121124127115

3045607590105tototototototo300mins


minsminsminsminsminsmms


Figure 2.17 Rural Session Duration Jan to Jun 1991

1200

1000

800

S ess600I 0ns 400

200

0

110

16to31 to46 to611076 to91 to106121151181211241271>15

304560759010510101010101010300mins



Figure 2.18 Rural Area Mean Session Duration

90

80

70

60

M

150nu

t 40es

30

20

10

o

Jul to Dec '89 Jan to Jun '90 Jul to Dec '90 Jan to Jun '91

AN OVERVIEW OF RANDoM BREATH TESTING OPERATIONS ... 11

Bus and car-based session duration: Whilst the average session duration of buses operatingin the rural area remained at around two hours, the distribution has changed over time with anincrease in the number of bus sessions less than one hour and also greater than five hours. Theduration of bus sessions in the metropolitan area did not change over the two year period witha mean duration of over 3 hours. Car session duration was also steady over the period in both

the metropolitan and rural areas with the majority of sessions being under 1 hour in duration.

The increase in session duration in the metropolitan area appeared to be the result ofthe shiftfrom predominantly car-based operations to almost totally bus-based operations which weretypically longer in duration. Since the shift towards buses was slower in the rural area the

introduction of the buses had relatively little effect on session duration in these areas until thefirst half of 1991.

2.2.5 Start/end times of RBT sessions

The start times in the metropolitan area did not greatly change with a median start time between

7pm and 8pm. Over that time period RBT operations tended to finish later with the median

finish time shifting from about 9pm in the last six months of 1989 to 11pm in the first six months

of 1991 (Figures 2.19 to 2.22). It appeared that the increase observed in session duration in

the metropolitan area was the result of the sessions running later. There was a reduction in the

level of testing during late morning and early afternoon.

In the rural area the start and end times ofRBT sessions did not greatly change. (Figures 2.23

to 2.26).

Figure 2.19 Metropolitan Start/End Times Jul to Dee 1989

I_ Start Hour 0 End Hour250

200

Se 150ssion 100s

50

o

o 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning


250

200

Se 15055I

'0

n 1005

50

o

250

200

Se 1S055Ion 1005

50

o

Figure 2.20 Metropolitan StartJEnd Times Jan to Jun 1990

I_ Start Hour 0 End Hour

o 1 2 3 4 S 6 7 8 9 10 11 12 13 14 1S 16 17 18 19 20 21 22 23

Hour Beginning

Figure 2.21 Metropolitan StartJEnd Times Jut to Dee 1990

I_ Start Hour D End Hour

o 1 2 3 4 S 6 7 8 9 10 11 12 13 14 1S 16 17 18 19 20 21 22 23

Hour Beginning


Figure 2.22 Metropolitan StartlEnd Times Jan to Jun 1991

I_ Start Hour 0 End Hour250

200

Se 150ssio

n 100s

50

o

o 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning

Figure 2.23 Rural StartlEnd Times Jul to Dec 1989

I_ Start Hour 0 End Hour

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning

700

600500

Se40055i0300n5

200

1000

0


700

600SOD

Se40055I°300n5

200

1000

0

700

600500

Ses 400sI0300ns

200

1000

0

Figure 2.24 Rural StartlEnd Times Jan to Jun 1990

/_ start Hour 0 End Hour

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning

Figure 2.25 Rural Start/End Times Jul to Dee 1990

I_ start Hour 0 End Hour

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning


Figure 2.26 Rural StartlEnd Times Jan to Jun 1991

\_ Start Hour 0 End Hour700

600

500

S

e 40055i0300n5

200

100

o

o 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Hour Beginning

2.2.6 RBT by day of week

In the metropolitan area Thursday, Friday and Saturday are the days with the highest number

of hours of RBT testing. RBT operations became even more concentrated on these days as

compared to the earlier part of the week (Figure 2,27) although there were substantial periods

of time spent testing on each day of week. The emphasis of time spent in rural RBT testing

shifted from Friday, Saturday and Sunday to be more in line with the metropolitan area (Figure2.28).

Figure 2.27 Metropolitan RBT Hours by Day of Week

• Jul to Dec '89 0 Jan to Jun '90 _ Jul to Dec '90 0 Jan to Jun '91

MONASH UNIVERSITY ACCIDENT RESEARCH CENTRE

600

500400

H

0u 300r5

200

100016

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

Figure 2.28 Rural RHT Hours by Day of Week

IIIJul to Dec '89 0 Jan to Jun '90 • Jul to Dec '90 0 Jan to Jun '91

1000

900800700600

H 0u 500rs 400

3002001000

Sunday

2.2.7 PBT

Monday Tuesday Wednesday Thursday Friday Saturday

There is very little information available about PBT tests (tests from mobile intercepts andcrash involved drivers) conducted in the two year period except for the number tested inmetropolitan and country areas each month. It should be noted that metropolitan and countryare Police definitions and differ slightly from the definitions used previously.

Of the 919,450 PBT tests conducted 62% occured in metropolitan areas while the remaining38% ofPBT tests were in country Victoria.

2.2.8 Hit rates

The RBT hit rate (percentage of positive BAC tests) in the metropolitan area over the two yearperiod (0.25 to 0.40%) was consistently higher than in rural Victoria (0.10 to 0.15%) as shownin Figure 2.29. For both areas the hit rate varied somewhat over this period with no clear upwardor downward trends. The hit rate for PBT (3 to 4%) is much higher than for RBT but, as withRBT, there was no obvious trend (Figure 2.30).

AN OVERVIEW OF RANDOM BREATH TESTING OPERATIONS ... 1 7

Figure 2.29 RBT Hit Rate (Positive BAC) - Metropolitan v. Rural

1_ Metropolitan - Rest of Stat~ I0.50

0.45

0.40

0.35

%

P 0.30

o

5I 025t

i 0.20V

e0.15

0.10

0.05

0.00

J A SON D

1989

F M A M J

1990

A SON D J F M A M

1991

6.00

5.00

% 4.00

po

s 3.00ItIve 2.00

1.00

0.00

Figure 2.30 PBT Hit Rate (Positive BAC) - Metropolitan v. Country

1-Metropolitan - Country

J A SON 01989

F M A M J

1990

A SON 0 F M A M1991


2.3 RBT in Police Districts

2.3.1 Hours spent RBT testing and numbers ottests conducted

The number of hours spent testing and the total number of RBT tests conducted within each

police district were examined (Figures 2.31 and 2.32).

Figure 2.31 Hours ofRBT Testing

,_ Division 1 0 Division 23500

3000

2500

H 2000our51500

1000

500

o

AB CD E F G H

Metropolitan

K L M N 0 P aRest of State

250000

200000

150000Te5t5

100000

50000

o

Figure 2.32 RBT Tests

I_ Division 1 0 Division 2

AB C D E F G H

Metropolitan

K L M N 0 P aRest of State


Districts in the metropolitan area spent similar amounts of time RBT testing and conducted

similar numbers of tests per hour (Figure 2.33). In districts A, B and C there were more testsconducted each hour, in comparison to other districts. This can be explained by the highertraffic volumes in these districts which are located in and around the inner metropolitan area.

Districts D, E and F recorded the lowest number of tests per hour.

Figure 2.33 RBT - Rate of Testing in Police Districts

I_ Division 1 0 Division 2160

140

T 120•st 100s

P 80•r

H 60our 40

20

o

A BeD E F G H

Metropolitan

K M N 0 P Q

Rest of state

In the different rural police districts there was marked variation in the number of hours spenttesting and the number of tests conducted. When broken down into the different divisions itcan be seen that the majority ofRBT in some rural districts was concentrated mainly in one ofthe divisions, generally the one closer to Melbourne. This is most evident in districts M and0, the two districts immediately north west of the metropolitan area.

2.3.2 Car and bus-based operations

The introduction of buses occurred almost immediately in all of the metropolitan policedistricts while their introduction to rural areas was slower and at varying times across policedistricts. Some rural districts/divisions began introducing buses early in 1990 while otherdistricts/divisions first began to use them in late 1990 or early 1991.

A detailed analysis of the number and proportion of hours and tests conducted from car and bus-based operations, for each individual police district, is presented in Appendix B.

In closely scrutinising the amount of bus use in the different police districts and divisions itappears that the type of RBT in a district can be categorised into one of three models. Themetropolitan districts were all similar, in that they moved to buses very quickly. In the ruralarea there appeared to be some districts/divisions that introduced low levels of bus based RBTin late 1989/early 1990 with the remaining areas making very little use of buses until, at least,late 1990.


2.4 Summary of RBT Operations

The main change in RBT activity over the two years was the increased usage of buses and the

decrease in car-based RBT. The introduction of buses almost immediately substituted car-

based RBT in all police districts in the metropolitan area while their introduction in the rural

area was much slower and varied across police districts.

This led to a much higher number of RBT tests and gradual, but relatively smaller, increases

in the total number of hours ofRBT operations and session duration in the metropolitan area.

In rural Victoria, the number ofRBT tests conducted and the duration ofRBT sessions (until

1991) remained relatively constant, even though the number of hours spent testing was variable

over time. In some rural areas bus-based RBT was used at low levels whilst at the remaining

rural locations bus-based RBT was not used consistently until late 1990/early 1991. Overall

in Victoria this resulted in a substantial increase in the number of RBT tests for only gradual

changes in the time spent testing.

REFERENCES

Cameron, M.H., Cavallo A., & Sullivan, G. 1992, Evaluation of the Random Breath TestingInitiative in Victoria 1989-1991. Multivariate Time Series Approach, Report No. 38, MonashUniversity Accident Research Centre, Clayton, Victoria

Cavallo, A., & Cameron, M.H. 1992,Evaluation of a Random Breath Testing Initiative inVictoria 1990 & 1991. Summary Report, Report No. 39, Monash University AccidentResearch Centre, Clayton, Victoria

Drummond, A.E., Sullivan, G., & Cavallo, A. 1992, Evaluation of a Random Breath TestingInitiative in Victoria 1989-1990. Quasi-experimental time series approach, Report No. 37,Monash University Accident Research Centre, Clayton, Victoria


Location of Metropolitan andRural Police Districts

Appendix A

flt'B~

2

~ -",..r

1

pIMOUNTAINS

LEGEND

- DISTRIcr BOUNDARIES

DIVISIONAL BOUNDARIES

,,~

z.-'

..

DISTRICT BOUNDARIES

'....." .

2

DIVISIONAL BOUNDARIES

e ••.•••.••••

.......•.. ~~.

LEGEND

Q

-17/./W\}

2

IllGHLANDS WIMMERA

2

1

N

MIiIiIIjI!IIii!

IIIIII

IjiI!I\II1

1Ii

Appendix B

RBT Operations in Police Districts

-j;-

Police District A

Number of RBT tests from Cars and Buses

IDear • Bus

8000

6000

4000

2000

o


July 89 - June 91

Police District A

Proportion of RBT tests from Cars and Buses

I Dear • Bus

100%".-

90"k

80%

70%

60%

50%

40%

30%

20"k

10%

11

I

IIJ A SON 0 J F M A M J J A SON 0 J F M A M J

July 88- June 81

Police District A

Number of Minutes of Car and Bus based RBT

IDear • Bus I

71

6000

5000

4

3000

2

I

I1

.~

•IfIrorI.r

~r rIr.r.r.r

J ASONDJ FMAMJ J ASONDJ FMAMJ

July 89 - June 91

Police District A

Proportion of Car and Bus based RBT Minutes

loear • Bus I

100o/in III6O"1c

40%

~

20%·

.-lj


July 89 - June 91

Police District B


loeM • Bus I

8000

6000

4000

2000

o


July 89 - June 91

Police District B


IOear • Bus

100%,.,.-

60%

I20%

J A SON D J F M A M J J A SON D J F M A M JJuly 89 - June 91

Police District B


IDear • Bus I

9000

8000

7000

6000

5000

4000

3000

2000

o


July 89 • June 91

Police District B


locar • Bus

l00%~

90%

80%

70%

60%

50%

40%

30%

20%

10%

-

J A SON D J F M A M J J A SON D J F M A M JJuly 811 • June III

8000

6000

4000

Police District C


IOcar • Bus

o


July89-June91

Police District C


ID Car • Bus

100%

80%

60%

40%

20%

0%

J A SON 0 J F M A M J J A SON 0 J F M A M JJuly 811· June 111

9000

8000

7000

6000

5000

4000

3000

2000

o

100%

80%

60%

40%

20%

0%

Police District C


IDear • Bus I


July 89 • June 91

Police District C


IOear • Bus I


July 88 • June 81

8000

6000

4000

o

100%'

80%

60%

40%

20%

0%

Police District D


jocar • Bus


July 89 - June 91

Police District D


IDear • Bus


July 811-Junelll

9000

8000

7000

6000

5000

4000

3000

2000

o

100"10

80%

60%

40%

20%

0%

Police District D


IDear .Bus I


July 89 - June 91

Police District D


10 Car • Bus I

J ASONDJ FMAMJ J ASONOJ FMAMJ

July 89 - June 81

8000

6000

4000

Police District E


Io ear • Bus I

2000

o

100%

80%

60%

40%

20%

0%


July 89 • June 91

Police District E


I o ear • Bus I

J ASONDJ FMAMJJASONDJ FMAM,'

July 88 • June 81

'-t::'.-.:~.

9000

8000

7000

5000

4000

3000

2000

o

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

Police District E


IDCar • Bus I


July 89 - June 91

Police District E


I o ear • Bus I


July 89 - June 91

8000

6000

4000

2000

o

Police District F


Io ear • Bus


July 89 - June 91

Police District F


I Dear • Bus

100%,..,-, ,-, _ ,-, _ r-

90%80%70%60%50"k40%30%20%~ ;; ; ~; ; ~; ; ~; ; ~ ~ III10%-H 11 11 I 1 I. 1 I. I 11 11 11 I ••0%


July 89 - June 91

Police District F


IDear .Sus I

9000

8000

7000

6000

5000

4000

3000

2000

1000

o

J ASONDJ FMAMJJ ASONDJ FMAMJ

July 89 • June 91

Police District F


I Dear • Bus I

100%,.,......, .--

90%

80%

70%

60%

50%

40%

30%

20"'{'

r- r-

-

10%

J A SON D J F M A M J J A SON 0 J F M A M J

July 89 • June 91

8000

6000

4000

Police District G


IDear • Bus I

2000

o


July 89 • June 91

Police District G


I Dear • Bus

40%

20%

00;;'


July 1111 • June 111

9000

8000

7000

6000

5000

4000

3000

2000

o

Police District G


IDear • Bus I


July 89 - June 91

Police District G


I Dear • Bus I

60%

40%

20%

0%

J ASONDJ FMAMJ J ASQNDJ FMAMJ

July 88 - June 81

8000

6000

4000

o

100%

90"k

80%

70%

60%

50%

40%

30%

20%

10%

0%

Police District H

Number of RET tests from Cars and Buses

Io ear • Sus I


July 89 - June 91

Police District H


I Dear • Bus


July 88 • June III

9000

8000

7000

6000

5000

4000

3000

2000

Police District H


IDCar .Bus I

1000

o


July 89 • June 91

Police District H


100%

80%

60%

40%

20%

0%

J A SON 0 J F M A M J J A SON 0 J F M A M JJuly 88 - June 81

Police District I


loear • Bus I

8000

6000

4000

2000

o


July 89 • June 91

Police District I


100%1

90%

80%

70%

60%

50%

40%

30%

20%

10%

•

-

I°ear • Bus

4J

-

-•

nJ A SON 0 J F M A M J J A SON 0 J F M A M J

July 88 • June 81

Police District I


IDear .Sus I

9000

8000

7000

6000

5000

4000

3000

2000

o


July 89 - June 91

Police District I


JOcar • Bus I

•

I··············

III I'-Ir-"J A SON 0 J F M A M J J A SON 0 J F M A M J

July 88 - June III

100%]11-90%80%70%60%50%40%30%200k10%0%

8000

6000

4000

o

Police District J


I o Car • Bus

100%

80%


July 89 - June 91

Police District J


IOear • Bus

60%

40%

20%

0%


9000

8000

7000

6000

5000

4000

3000

2000

o

100%

80%

60%

40%

20%

0%

Police District J


IDear • Bus

JASONDJFMAMJJASONDJ FMAMJ

July 89 • June 91

Police District J


I Dear • Bus I

JASONDJFMAMJJASQNDJ FMAMJ

July 811- June 111

8000

6000

4000

2000

o

100%

80%

60%

40%

20%

0%

Police District Kl


loear • Bus I

J ASONDJ FMAMJ JASONDJ FMAMJ

July 89 - June 91

Police District Kl


I o ear • Bus I


July 811- June 111

9000

8000

7000

6000

5000

4000

3000

2000

Police District Kl


10 Car • Bus I

1000

o

100"10

80%

60%

40%

20%

0%


July 89 • June 91

Police District Kl


10 Car • Bus I

- ~-- - ~ -

-


July 89 • June 91

8000

6000

4000

Police District K2


IOear • Bus

2000

o


July 89 • June 91

Police District K2


I o ear • Bus

100''

9000

8000

7000

6000

5000

4000

3000

2000

1000

o

100%

40%

20%

0%

Police District K2


IDCar • Bus I

J ASONOJ FMAMJ J ASONOJ FMAMJ

July 89 • June 91

Police District K2


I Dear • Bus I

r- - - .r-I---.-r-I-

~


July 89 • June 91

Police District Ll


IDear • Bus

8000

6000

4000

o


July 89 - June 91

Police District L 1


I Dear • Bus

,. - - ~------ •-r---1""'\

90010

100%

80%

70%

60%

50%

40%

30%

20010

10%

0%


July 89 - June 91

9000

8000

7000

6000

5000

4000

3000

2000

Police District L 1


IDear • Bus

1000

o

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%


July 89 • June 91

Police District Ll


I Dear • Bus

;- - ;-- ;-

--'--1•- -- •

~

JASONDJFMAMJJASONDJ FMAMJ

July 88 - June 81

8000

6000

4000

o

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0"10

Police District L2


IDear • Sus I


July 89 - June 91

Police District L2


IOear • Bus

- - r- ~----- --- --I•

-


July 89 - June 91

Police District L2


Io ear • Sus

9000

8000

7000

6000

5000

4000

3000

2000

1000

o


July 89 - June 91

Police District L2


I Dear

1OO%-rr---1 ,---, r-l .-. ,......,,---,r-l ,--, r--l r--'1 r--

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

• Bus

~roroll·


July 89 • June 81

8000

6000

4000

Police District Ml


IOear I Sus

2000

o


July 89 • June 91

Police District Ml


10 Car • Bus

100%

90%

80%

70%

60%

50%

40%

20%

10%

0%

-c--c-.c- 1-·••••I-

~-

JASONDJ FMAMJ J ASONDJ FMAMJ

July 88 ·June81

5000

6000

8

7

4,

3

2

Police District Ml


IDear • Bus I

}

I

L

I,..,I, I,tI, I

I.I.11.I.I.


July 89 - June 91

Police District Ml


IDear • Bus I

100%

80%

60%

40%

20%

0%

------II~I-I-.- - III


July all- June III

8000

6000

4000

2000

o

80%

60%

40%

20%

0%

Police District M2


IDear • Bus


July 89 - June 91

Police District M2


IDear • Bus

- ---~- ----r-- ---- •- -


July 811-June 91

9000

8000

7000

6000

5000

4000

3000

2000

o

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

Police District M2


IDear • Sus


July 89 - June 91

Police District M2


IDear • Bus

- r- -r--r- r--r--r- r---r-I- ---


July 89 - June 91

8000

6000

4000

Police District NI


IDear • Bus

2000

o

100%

80%

60%

40%

20%

0%


July 89 • June 91

Police District NI


I Dear • Bus

- r- --~-----------


July 88 - June 91

9000

8000

7000

6000

5000

4000

3000

2000

Police District NI


IDear • Bus

1000

o


July 89 - June 91

Police District NI


IOear • Bus

100%

600/0

40%

20%

0%

r- - r--- r-- r-----r---r--- •

J A SON 0 J F M A M J J A SON 0 J F M A M JJuly ae • June 81

8000

6000

4000

2000

Police District NZ


10 Car • Bus

o


Police District N2


jocar • Bus

100%

60%

60%

40%

20%

0%

- --•.---;------- -~-.----I .--


July 89 - June 91

9000

8000

7000

6000

sooo

4000

3000

2000

Police District N2


IDear • Bus

1000

o


July 89 • June 91

Police District N2


~r • Bus

100%

80%

60%

40%

20%

- -~Ir--r--~-~- --r--r--I --


July 89· June 91

8000

6000

.4000

o

Police District 01


I°Car • Bus


July 89 • June 91

Police District 01


~ar • Sus

100%'_~---~-- - • I80%

60%

40%

20%

0%


July 89 • June 91

6000

5000

4

3

2

Police District 01


IDear • Bus I

I, .,I, I, .,•I,I.I,.,I, I, I..J A SON 0 J F M A M J J A SON 0 J F M A M J

July 89 • June 91

Police District 01


I o ear • Sus I

90%

100%

·--~·~--~II-IIIIII -. I80%

70%

60%

50%

40%

30%

20%

10%

0%


July 89 - June 91

8000

6000

4000

Police District 02


IOear • Bus

o


July 89 - June 91

Police District 02


I Dear • Bus

100%

80%

60%

40%

20%

0%

r- - r- -- .---- .---- r-e--r-- -

-

~


July 89 - June 91

9000

8000

7000

6000

5000

4000

3000

2000

1000

o

Police District 02


IDCar • Bus I


July 89 • June 91

Police District 02


I DCar • Bus

100%

80%

40%

20%

0%

- ~- ,..--r--r--~- --~I

-

~


July 811· June III

Police District PI


I DCar • Bus I

8000

6000

4000

o


July 89 - June 91

Police District PI


IOcar • Bus

,- ~ -~-~-- - ~-- II- I-

-

,

80%

60%

20%

100%

0%


July 89 - June 91

Police District PI


IDear • Bus I

9000

8000

7000

6000

5000

4000

3000

2000

1000

o


July 89 - June 91

Police District PI


IDCar • Bus

100%n-0 ~ ~ • n n n n n ~ n n Inn I~11~nil40%

20%


July 89 • June 91

8000

6000

4000

o

100%

80%

60%

40%

20%

0%

Police District P2


Io Car I Sus


July 89 - June 91

Police District P2


I Dear • Bus

---- 1- r-- - -

-

,~, -


July 89 - June 111

9000

8000

7000

6000

5000

4000

3000

2000

1000

o

100%

80%

60%

40%

20%

0%

Police District P2


jocar • Bus


July 89 - June 91

Police District P2


IDear • Bus

--~-II-I -- - --

-


July 89 • June 81

8000

6000

4000

Police District Q 1Number of RBT tests from Cars and Buses

IOear • Bus

2000

o


July 89 - June 91

Police District Ql


IOear • Bus

,-- - -,--,---- -II ~80%

60%

40%

20%

0%


July 89 - June 91

9000

8000

7000

6000

5000

4000

3000

2000

1000

o

100%

80%

60%

40%

20%

Police District Q 1Number of Minutes of Car and Bus based REI

IDear • Bus I


July 89 - June 91

Police District Q 1


10 Car • Bus

--r--r---~-

1- -11-

P""'\

~-


July 811• June III

8000

6000

4000

o

100%

90%

80%

70%

60%

50"10

40%

30%

20%

10%

0%

Police District Q2Number of RET tests from Cars and Buses

IDear • Bus


July 89 • June 91

Police District Q2


Io ear • Bus

r- --- - r-- -~-

~


July 89 • June 91

9000

8000

7000

6000

5000

4000

3000

2000

o

100%

80%

60%

40%

20%

0%

Police District Q2Number of Minutes of Car and Bus based RBT

IDear • Bus

J A SON 0 J F M A M J J A SON 0 J F M A M JJuly 89 • June 91

Police District Q2


10 Car • Bus

r- --r-Ir-- r- I- --

-i


July 89 - June 91

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