TY  - JOUR
PY  - 1977//
TI  - Evaluating location effectiveness of freeway directional and diversion signs (abridgment)
JO  - Transportation research record
A1  - Levin, Moshe
SP  - 122
EP  - 124
VL  - 644
IS  - 
N2  - A model is described which uses gap acceptance concepts and considerations for safe maneuvering to calculate the theoretical probability of completing a lane-change under various traffic flow conditions and to evaluate the effectivenes of various sign locations. A discussion of the model is presented as well as the development of lane-change distance-probability relationship and the effectiveness of location of diversion and directional signs. It is concluded that the probability curves for the distance involved in a lane-change maneuver on a four-lane freeway provide a reasonable measure of effectiveness for the location of a sign. An evaluation of the current practice of locating directional signs reveals that both the 1.6-km and 3.2-km signs are approximately the same in effectivenss. The gain in effectiveness from locating real time diversion signs of 50-cm letter height, 0.4 km (0.25 mile) in advance of the diversion point, is relatively small.<p />
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -