The Los Angeles Department of Transportation

Zaki Mustafa Principal Transportation EngineerPast President Institute of Transportation Engineer

Mohammad BlorfroshanSenior Transportation Engineer

Meeting Outline

n Project historyn Project

alternativesn Roundabout

discussionn Questions

Bundy & Mayfield

Safety

Safety

Safety

Issues with Bundy Corridor

n Pedestrian Safetyn Cars driving too fast on Bundyn Vehicle right of wayn Few north-south streets through Brentwoodn Stop signs lead to congestion on Bundyn Cars backing up onto Wilshire

Bundy & Mayfield

n Remove stop signs on Bundyn All-way stop signsn Rectangular flashing beaconsn Mini roundaboutn Traffic signal

All-Way Stop Signn Pros

n Reduces speedingn Increases ped safetyn Costn Aesthetics

n Consn Increases congestionn Decreases ped safety

n No marked crosswalks currently

Rectangular Flashing Beacons

n Prosn Increases ped safetyn Decreases congestionn Aesthetics n Cons

n Consn Increases speedingn Decreases ped safety

Traffic Signaln Pros

n Reduces congestionn Increases ped safetyn Decreases speeding

n Consn Increases speedingn High costn Aesthetics

Roundaboutn Pros

n Decreases speedingn Increases ped safetyn Reduces congestionn Aesthetics (phase II)

n Consn Costn Aesthetics (phase I)

Roundabout

Roundaboutn Removing traffic control can increase driver

awarenessn Speeding reduces because forced change of

directionn Lower speeds reduce crash severityn Roundabouts place pedestrians in a more visible

location.

Proven to be Effective

n Roundabouts reduced injury crashes by 75 percent at intersections where stop signs or signals were previously used for traffic control, studies have shown that roundabouts typically achieve:

37 percent reduction in overall collisions75 percent reduction in injury collisions90 percent reduction in fatality collisions40 percent reduction in pedestrian collisions

n Roundabouts promote safety in several ways.

Proven to be Effectiven Reduction in Crashes n Severity of Injury is reduced because of the slower speed

20-25mphn Reduction of Rear End Crashesn Reductions in injury crashes of 72-80 percent n Reductions in all crashes of 35-47 percent.n Reduces Over all Speedn Roundabouts replaced stop signs found that vehicle delays

were reduced 13-23 percent

Proven to be Effective

Proven to be Effectiven Institute for Highway Safety (IIHS) n Institute of Transportation Engineersn FHWAn Transportation Research Boardn NACTOn CALTRANSn Other State Agencies

LADOT

Together we are the BEST !