NCJ Number
12860
Date Published
1973
Length
395 pages
Annotation
DESIGN BY ONE OF FOUR CORPORATIONS FOR A REAL-TIME AUTOMATIC VEHICLE MONITORING (AVM) SYSTEM WHICH LOCATES VEHICLES BY PHASE MULTILATERATION IS DESCRIBED.
Abstract
A VEHICLE'S TWO-WAY RADIO TRANSMITS A TONE, IN AN ASSIGNED TIME SLOT, WHICH IS RECEIVED BY MULTIPLESENSORS, LOCATED AROUND AND WITHIN THE TEST AREA, AND THEN SENT TO THE BASE STATION VIA DEDICATED TELEPHONE LINES. AT THE BASE STATION THE INFORMATION IS FED INTO A COMPUTER WHERE THE TIME DIFFERENCE-OF-ARRIVAL COMPUTATIONS ARE PERFORMED AND THE VEHICLE POSITION IS DISPLAYED. THIS REPORT EXAMINES A BASELINE SYSTEM CONFIGURATION FOR THE AUTOMATIC MONITORING OF 1000 VEHICLES, INCLUDING INFORMATION ON EQUIPMENT DESCRIPTION, SYSTEM OPERATION, SYSTEM VARIATIONS, A COST ANALYSIS, AND DETAILED RESULTS OF FIELD TESTING IN THE PHILADELPHIA AREA. TECHNICAL DATA AND SUPPLEMENTAL ANALYSES ARE PROVIDED IN 12 APPENDICES. ALTHOUGH SPECIFICALLY DESIGNED FOR A PUBLIC BUS TRANSIT NETWORK, THE SYSTEM DESCRIBED OFFERS GENERAL APPLICATION TO ANY VEHICLE FLEET OPERATION, ESPECIALLY POLICE. (AUTHOR ABSTRACT MODIFIED)