On May 20, 2017 the LADOT installed a ‘Road Diet’ on Venice Blvd, a 49,000 car per day road according to CalTrans traffic counts taken in 2015. 1 travel lane in each direction was removed, taking the 6 lane road down to 4. Since the road diet was installed the number of accidents and injuries have increased significantly, not decreased as claimed by the LADOT.
Accident data from the CHP Statewide Traffic Reporting System (SWITRS) database shows that in the 12 months following the road diet accidents are up over the previous 12 months, the 5 year and 15 year averages. All this while traffic counts performed by the LADOT show that traffic volume has dropped 15% from pre-road diet levels.
Less cars, more accidents, more injuries.
Experiences here in Los Angeles as well as case study data show that high volume arterial boulevards are not appropriate candidates for a road diet. It is for these reasons the Michigan DOT places the upper limit on roads that are candidates for a ‘Road at 1/2 the FHWA standard, or 10,000 cars per day.
Download the raw data: 2003 - 2008 ; 2009 - 2018
By California law all police reports for all injury accidents that occur in the State of California must be submitted to the CHP for inclusion into the SWITRS database. Agencies are encouraged to submit reports of Property Damage Only accidents but it is not required by state law.