@article{ref1,
title="Algorithm for a real-time advisory sign control system for urban highways",
journal="Transportation research record",
year="1974",
author="Wiener, R. and Kleinman, S.",
volume="495",
number="",
pages="64-74",
abstract="To reduce acceleration noise and thereby accident probability, and on-highway traffic-responsive control system is proposed that transmits advance warning of impending slowdowns. In the proposed system, the control system output consists of command settings for advisory speed signs that are spaced along the highway at intervals of 0.1 mile (0.16 km). The system input consists of speed and vehicle-count information from roadbed detectors, also spaced at 0.1 mile intervals. This paper details the derivation of the sign control algorithm that culminates in a formula expressing the speed setting of an advisory sign in terms of the detected speed and vehicle-count data. The control algorithm is designed to influence the trajectory of a vehicle at times of impending slowdowns such that its contribution to the acceleration noise integral is minimized. Examples are presented that show the application of the sign setting algorithm to hypothetical traffic situations.<p />",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}