00605650

Component

http://onlinepubs.trb.org...trr/1990/1287/1287-016.pdf

https://scholar.google.co...nder&publication_year=1990

The reliability of detector data is critical to efficient and effective transportation management through a freeway traffic management system (FTMS). An error detection algorithm is developed for the FTMS in the Seattle area. Although the current system includes some rudimentary data error checking, many detector failures and data errors remain undetected. The new algorithm uses volume-to-occupancy ratios to test 20-sec volume and occupancy data. The algorithm was tested by changing detector amplifier settings and producing manual actuations in the field to simulate detector malfunction states. The algorithm produced few false alarms when tested under simulated conditions. It reliably identified short-pulse (hanging-off) malfunctions during the simulation tests. The algorithm provides a relatively simple and affordable improvement to the Washington State Department of Transportation's existing freeway data screening methods.

This paper appears in Transportation Research Record No. 1287, Traffic Flow, Capacity, Roadway Lighting, and Urban Traffic Systems 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

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p. 151-166

1990

Transportation Research Record

0309050626

Figures (14) ; References (14) ; Tables (8)

Algorithms; Detection and identification; Detectors; Errors; Freeways; Highway traffic control; Loop detectors; Reliability; Traffic surveillance

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Mar 31 1991 12:00AM

• ADAPTIVE FORECASTING OF FREEWAY TRAFFIC CONGESTION
• CAPACITY AND DELAY ESTIMATION FOR PRIORITY UNSIGNALIZED INTERSECTIONS: CONCEPTUAL AND EMPIRICAL ISSUES
• CAPACITY AND SPEED-FLOW ANALYSIS OF THE QUEEN ELIZABETH WAY IN ONTARIO
• COMBINED EFFECT OF RADIUS AND PEDESTRIANS ON RIGHT-TURN SATURATION FLOW AT SIGNALIZED INTERSECTIONS
• CONFLICT SIMULATION IN INTRAS: APPLICATION TO WEAVING AREA CAPACITY ANALYSIS
• CONGESTION IDENTIFICATION ASPECTS OF THE MCMASTER INCIDENT DETECTION ALGORITHM
• CONSPICUITY OF RETROREFLECTIVE SIGNS AND DEVICES AT NIGHT WHEN DRIVING WITH ONLY ONE HEADLAMP WORKING
• COUNTERBEAM LIGHTING, A PROVEN ALTERNATIVE FOR THE LIGHTING OF THE ENTRANCE ZONES OF ROAD TUNNELS
• ESTIMATING AVERAGE CYCLE LENGTHS AND GREEN INTERVALS OF SEMIACTUATED SIGNAL OPERATIONS FOR LEVEL-OF-SERVICE ANALYSIS
• ESTIMATING CAPACITY OF AN ALL-WAY-STOP-CONTROLLED INTERSECTION
• FLOW PROCESSES AT A FREEWAY BOTTLENECK
• LATE-NIGHT TRAFFIC SIGNAL CONTROL STRATEGIES FOR ARTERIAL SYSTEMS
• MEASURING DELAY AND SIMULATING PERFORMANCE AT ISOLATED SIGNALIZED INTERSECTIONS USING CUMULATIVE CURVES
• MEASURING LEVEL OF SERVICE OF TWO-LANE HIGHWAYS BY OVERTAKINGS
• MODEL OF TURNING MOVEMENT PROPENSITY
• MODELING THE LEFT-TURN ADJUSTMENT FACTOR FOR PERMITTED LEFT TURNS MADE FROM SHARED LANE GROUPS
• MULTIBAND--A VARIABLE-BANDWIDTH ARTERIAL PROGRESSION SCHEME
• ON-LINE DIVERSION PREDICTION FOR DYNAMIC CONTROL AND VEHICLE GUIDANCE IN FREEWAY CORRIDORS
• PREDICTION OF TRAFFIC FLOW BY AN ADAPTIVE PREDICTION SYSTEM
• SIMULTANEOUS OPTIMIZATION OF SIGNAL SETTINGS AND LEFT-TURN TREATMENTS
• TESTING AND FIELD IMPLEMENTATION OF THE MINNESOTA VIDEO DETECTION SYSTEM (AUTOSCOPE)
• TRAFFIC CONFLICT VALUES FOR THREE-LEG, UNSIGNALIZED INTERSECTIONS
• TRAFFIC SIGNAL DELAY MODEL FOR NONUNIFORM ARRIVALS
• WASHINGTON STATE UNIVERSITY PARKING ACTION PLAN--A CAMPUS PARKING CASE STUDY