TRIBAL SAFETY CHAMPIONSWORKSHOP

December 2 – 3, 2014Embassy Suites Hotel & Conference Center

Norman, Oklahoma

Proven Safety Countermeasures

Huy A. Nguyen, PEFHWA Safety EngineerOklahoma City, OK

Oklahoma SAFETEA-LU

RECESSION

SHSP

OklahomaCable Barrier Rumblestrip

Interstates (Head-on Fatalities)2001 – 2007 (7 yrs): 33

2007 – Now (7+): 19

36% reduction

http://safety.fhwa.dot.gov/provencountermeasures/

Roundabouts

Corridor AccessManagement

Backplates w/RetroreflectiveBorders

Rumblestrip /Rumblestripes

Enhanced DelineationHigh Friction

Safety Edge

Median / PedestrianCrossing Islands

Pedestrian HybridBeacon (HAWK)

Road Diet

Proven Safety Countermeasures

Roundabouts

IT’S NOT THE OLD TRAFFIC CIRCLES / ROTARY!!! Smaller / Central Raised Island Slower Entry / Circulating / Exit Speeds Splitter Islands Very Efficiency in term of Traffic Operations and Safety

Roundabouts

N. Walker & NW 10th, Oklahoma City

Roundabouts

Eliminate 90o angle high speed accidents to side swipe low speed collisions

No traffic signal to retime No signal hardware to maintenance 48% reduction in overall crashes 78% reduction in severe (injury/fatal) crashes No traffic delay (yield conditions)

Lots of negative public perception (lack of awareness)

Corridor Access ManagementControl of entry / exit points

(driveways / intersections)- Relocate / consolidate

Reduce conflict pointsPreserved land-useReduce congestion Balance between

- safety & mobility

Myth: impacting business

Corridor Access Management Part of EDC Initiatives – Intersections / Interchange

- Restricted Crossing U-Turns (Super Street, J-Turn)- Median U-Turn & ThrU-Turn (Michigan Turn)- Displaced Left Turn (Continuous Flow Intersections)

Backplates withRetroreflective Borders

More conspicuous 15% crash reductionVery low cost

http://www.cmfclearinghouse.org

Rumblestrips / RumbleStripEs Milled / Rolled / Formed / Raised

Rumblestrips / RumbleStripEs Effective: drowsiness / fatigue Shoulder 2L: 36% reduction of fatal / injury crashes Centerline Rumblestrips Narrow Shoulder rumblestrips

Cyclists

Enhanced Delineation / Frictionfor Horizontal Curves

28% fatal crashes at curves 2L undivided: 12-38% reductionDynamic sequential (LED)

Enhanced Delineation / Frictionfor Horizontal Curves

High Friction Surface Treatment32% and 65% wet condition

Median / Pedestrian CrossingIslands

Midblock: 70% pedestrian fatalitiesA safe place to stop46% reduction in pedestrian crashesSignificant mixtures

Safety EdgeOvercorrected2” Improve Pavement Life

Safety Edge

Cost is almost negligibleVery easy to install30 degree

Pedestrian Hybrid Beacon(H.A.W.K)

High intensity Activated crossWalK)Stay dark until activatedUse with pavement markingMidblock pedestrian crossings29% reduction of total crashes69% reduction of pedestrian crashes

Pedestrian Hybrid Beacon(H.A.W.K)

Road Diet

29% reduction of all roadway crashes

Road Diet29% reduction in all roadway crashesFewer midblock crossing locationsReducing vehicle speedsImprove mobility and accessImprove livability and quality of life.

QUESTIONS?