TEAPAC Suite, TURNS details

TURNS
Turning Movement Count Summary and Analysis

TURNS is the traffic count analysis function in TEAPAC Complete that reduces, tabulates, summarizes and analyzes turning movement traffic counts in a complete, easy-to-do manner. The program handles all 12 movements at an intersection with the input being either cumulative or reduced counts. Input can be entered manually in the standard TEAPAC full-screen edit mode, or directly from electronic count devices such as the Jamar and TimeMark traffic counters for up to 24 hours worth of 15-minute counts. Counts can be adjusted by seasonal adjustment factors and 24-hour volumes can be estimated by an input ADT factor.

The outputs of the program are fifteen minute and sixty minute volume tabulations by individual movement, approach leg, exit leg and intersection total. Separate tabulations of counted trucks can be made. The program also lists the hourly flow rate of each 15-minute count interval for compatibility with the 2016 and 2000 Highway Capacity Manuals. Peak period analyses are provided including either the peak hour or peak 15-minute volume, percentage of turns, peak hour factors, and highest hour volume for each movement, approach, exit and the intersection total. In addition, a graphical plot of the intersection volumes can be made to quickly assess the peaking characteristics. The peak period analyses can be conducted for the A.M., P.M., midday, and for offpeak periods by time periods that are program- or user-specified. Peak period volumes can also be displayed on a schematic intersection diagram.

Peak hour volumes or 15-minute flow rates and peak hour factors determined by the peak hour analysis can be used directly by other TEAPAC functions such as for capacity analysis, background traffic of site impact studies, or existing volumes for signal system timing studies.

this page last updated February 04, 2019