Estimating intersection approach delay using 1985 and 1994 highway capacity manual procedures
SM Braun, JN Ivan - Transportation research record, 1996 - journals.sagepub.com
SM Braun, JN Ivan
Transportation research record, 1996•journals.sagepub.comThe current methods for determining average stopped delay at signalized intersections were
studied. Field measurements of average stopped delay were obtained and compared with
values computed using both the 1985 and 1994 editions of the Highway Capacity Manual
(HCM). The 1994 HCM uses an equation to predict the progression adjustment factor (PF), a
new technique for determining the left-turn adjustment factor for saturation flow rates, and a
new set of equations for determining the uniform delay parameter for left-turn lane groups …
studied. Field measurements of average stopped delay were obtained and compared with
values computed using both the 1985 and 1994 editions of the Highway Capacity Manual
(HCM). The 1994 HCM uses an equation to predict the progression adjustment factor (PF), a
new technique for determining the left-turn adjustment factor for saturation flow rates, and a
new set of equations for determining the uniform delay parameter for left-turn lane groups …
The current methods for determining average stopped delay at signalized intersections were studied. Field measurements of average stopped delay were obtained and compared with values computed using both the 1985 and 1994 editions of the Highway Capacity Manual (HCM). The 1994 HCM uses an equation to predict the progression adjustment factor (PF), a new technique for determining the left-turn adjustment factor for saturation flow rates, and a new set of equations for determining the uniform delay parameter for left-turn lane groups with primary and secondary phasing. Overall, the 1994 HCM produces better estimates of intersection stopped delay than the 1985 HCM.
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