A Comparison between Highway Capacity Manual and Critical Lane Volume Analysis Methodologies for Traffic Impact Study Applications

BACKGROUND Intersections generally are analyzed (using methods such as CLV and HCM) as part of a TIS in order to determine if there is adequate residual capacity available in order to add additional traffic through an intersection as a result of proposed development. If the analysis indicates that adequate residual capacity does not exist, additional analyses are performed under various improvement scenarios (i.e. adding lanes, etc.). The goal is to identify reasonable improvements that are necessary to ensure that the intersection will operate at least at the same operational level as it did before the additional generated traffic.