Road Diets Lane reduction Four–to–two lane conversion Accommodates existing and future traffic without widening Benefits all modes of travel Increases safety
FHWA – Road Diets Proven SafetyCountermeasure The Federal Highway Administration (FHWA) Office of Safety placed Road Diets on the official list of Proven Safety Countermeasures. States are actively encouraged to use the listed safety countermeasures and FHWA provides guidance on their application. Road Diets slow traffic by reducing car travel lanes and replacing them with things like bike lanes and center turn lanes.
Which road carries more traffic? Which road produces higher speed? 4-lane: faster driver can pass others 2-lane: slower driver sets speed Which road produces higher crash rate? Which is better for bicyclists? Pedestrians? Businesses?
Valencia Street, San FranciscoEconomic Effects of Traffic Calming onSmall Urban BusinessesEmily Drennen2003
Valencia StreetBefore -62.5 ft widestreet withmetered parkingon street on 21’ 10’3’’ 10’3’’ 21’both sides, fourlanes with anaverage ADT of22,000 VPD Designing Streets for Pedestrian Safety-Reducing Crossing Crashes
Valencia Street, San Francisco CaliforniaAfter-Two lanes wereremoved, bicyclelanes installedand medianswere used for leftturns. 8 5’9’’ 10’6’’ 14’ 10’6’’ 5’9’’ 8’-Changes were ’made to signal Designing Streets for Pedestrian Safety – Reducing Crossing Crashestiming.
Handles 20,000 ADT 25000 20000 15000 10000 5000 0 Dolores Guerrero Valencia Mission S. Van Ness 1998 – before Valencia Road Diet 2000 - after Valencia Road DietMission District, San FranciscoNorth-South ADT 11
Road Diets change intersectiondesignOlder Americans: 21% over 65 do not drive Over 50% of non- drivers stay at home on a given day because they lack travel options 54% of older Americans living in inhospitable neighborhoods would walk and ride more if things improved 12
Road Diets benefit people withdisabilities Shorter crossing distances reduce time spent in the street. Vehicle speeds reduced Improved mobility for people with disabilites and reduced need for expensive paratransit service