The goal of access management is to reduce the accident rate and improve the flow and speed of traffic on a highway system. Numerous research studies have consistently shown that the more access points per mile, the higher the accident rate. Access management techniques reduce the number of conflict points. Therefore, it is logical for accident rates to be lowered as the average distance between access points increases. This paper looks at current proposals for changing the unsignalised capacity analysis procedures that include: modifying the conflicting volume formulas; modifying base critical gaps, move-up times; using adjustment procedures, including new procedure for estimating capacity with a raised or striped median or two-way left-turn lane on a major street; adding a flared approach analysis; and expanding progression signalisation analysis. (A)
Samenvatting