Citation

Manor D. IMSA J. 2003; 41(2): 38-39.

Copyright

(Copyright © 2003, International Municipal Signal Association)

DOI

unavailable

PMID

unavailable

Abstract

Adaptive Traffic Control systems require increasingly sensitive and accurate traffic surveillance technology that can't be matched by the traditional inductive loop detector because of its high life-cycle and installation cost. Merging two proven technologies can achieve the needed enhancement of existing system. Remote traffic microwave sensor (RTMS) radar sensors, which include an internal RF (radio frequency) modem, are low-cost sensors that have been deployed in many advanced traffic management systems. They enjoy high accuracy in all weather conditions are easy to install on existing poles and do not require scheduled maintenance. They can be communicated with by wireless modems and powered by solar panels, making possible a totally wireless network. But instead of using network-type RF modems, which require compromises in data transmission, special software integration and subscription fees, Frequency Hopping Spread Spectrum (FHSS) RF modems can provide fully secure, dedicated links, with minimum interference and independent of a subscriber network. This article describes how a proprietary system, the EIS SPIDER system (Simple Presence In-lane Detection Event Reporting)integrates these systems.