Access Spacing Based on Turning-Vehicle Acceleration

作者：Gattis James L^*; Chimka Justin R; Evans Andrew

来源：Transportation Research Record, 2017, 2618(2618): 1-7.

DOI：10.3141/2618-01

Spacing between access connections-whether between a public roadway and a driveway or between two successive driveways-is one of the core techniques employed to effect access management. Several rationales reflecting different types of traffic interactions have been developed as a basis for minimum spacing distances. A small study was done in which two attributes were recorded: positions of vehicles turning from a side street and accelerating along the through roadway and time required for vehicles to turn left from the through roadway into a driveway. The vehicle movement described-a vehicle turning right from the side street into the through roadway-may be more likely to surprise the driver contemplating a left turn from the through roadway. Information derived from these observations, combined with perception-reaction values found in the literature, offers a basis for minimum spacing criteria that addresses one of many types of traffic interactions related to spacing, where a left turn is allowed across the through roadway downstream of another connection. These findings provide one more means to assess spacing along four-lane arterials in a developed suburban environment. A study with a greater scope to expand these findings is also proposed.

• 出版日期2017