NACTO released the Urban Street Design Guide with more pedestrian, transit and bike friendly designs last year. Here is their chapter on traffic signals: http

NACTO released the Urban Street Design Guide with more pedestrian, transit and bike friendly designs last year. Here is their chapter on traffic signals: http://nacto.org/usdg/intersection-design-elements/traffic-signals/ http://nacto.org/usdg/intersection-design-elements/traffic-s... Several state DOTs have endorsed the NACTO USDG.