Post on 18-Dec-2015
transcript
TRIBAL SAFETY CHAMPIONSWORKSHOP
December 2 – 3, 2014Embassy Suites Hotel & Conference Center
Norman, Oklahoma
Proven Safety Countermeasures
Huy A. Nguyen, PEFHWA Safety EngineerOklahoma City, OK
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
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)
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
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
Road Diet29% reduction in all roadway crashesFewer midblock crossing locationsReducing vehicle speedsImprove mobility and accessImprove livability and quality of life.