The 2010 and 2016 Highway Capacity Manual Signalized Intersection Methodology

The 2010 HCM (Highway Capacity Manua in Special report 209, Transportation Research Board, Washington D.C., [1]) signalized intersection methodology completely changed the organization and emphasis of the chapter on isolated signalized intersections. Previous versions of the signalized intersection chapter presented a pretimed methodology, with an appendix added in 1997 containing an outline for determining an average cycle length and phase times for an actuated controller. The 2010 and 2016 HCMs are organized to present the methodology for an actuated signal, with pretimed signal phasing handled as a subset of the actuated controller methodology by setting all the recall settings to maximum.