00803814

Component

https://doi.org/10.3141/1727-10

http://scholar.google.com...ssas&publication_year=2000

The formulation of a real-time traffic control policy designed expressly for oversaturated arterials is presented, and the operating protocol is described. Its objectives are to (a) maximize system throughput, (b) fully use storage capacity, and (c) provide equitable service. This control policy, known as RT/IMPOST (real-time/internal metering policy to optimize signal timing), is designed to control queue growth on every saturated approach by suitably metering traffic to maintain stable queues. Consistent with this approach, bounds on queue lengths and signal offsets are determined. A mixed-integer linear program (MILP) tableau is formulated to yield optimal values of signal offsets and queue length for each approach. A nonlinear (quadratic) programming formulation adjusts the arterial green-phase durations of each signal cycle so that the actual arterial queue lengths on each saturated approach will continually closely approximate the optimal queue lengths computed by the MILP formulation. The policy principles are as follows: (a) the signal phase durations "meter" traffic at intersections servicing oversaturated approaches to control and stabilize queue lengths and to provide equitable service to competing traffic streams; and (b) the signal coordination (i.e., offsets) controls the interaction between incoming platoons and standing queues in a way that fully uses the available storage capacity, keeps intersections clear of queue spillback, and maximizes throughput.

This paper appears in Transportation Research Record No. 1727, Advanced Traffic Management Systems and Automated Highway Systems 2000.

English

p. 77-88

2000

Transportation Research Record

0309067340

Figures (9) ; References (8)

Arterial highways; Length; Mixed integer programming; Offsets (Traffic signal timing); Optimization; Queuing; Real time information; Traffic congestion; Traffic control; Traffic oversaturation; Traffic signal timing

Traffic metering

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Dec 6 2001 12:00AM

• ARE MINIMIZATION OF DELAY AND MINIMIZATION OF FREEWAY CONGESTION COMPATIBLE RAMP METERING OBJECTIVES?
• AUTOMATIC VEHICLE IDENTIFICATION TECHNOLOGY-BASED FREEWAY INCIDENT DETECTION
• CALIBRATION OF PLATOON DISPERSION PARAMETERS ON THE BASIS OF LINK TRAVEL TIME STATISTICS
• COMPARISON OF VISSIM AND CORSIM TRAFFIC SIMULATION MODELS ON A CONGESTED NETWORK
• CONTROL STRATEGIES FOR TRANSIT PRIORITY
• DEVELOPMENT AND EVALUATION OF INTELLIGENT BUS PRIORITY CONCEPT
• ENHANCED GENETIC ALGORITHM FOR SIGNAL-TIMING OPTIMIZATION OF OVERSATURATED INTERSECTIONS
• FREEWAY TRAFFIC SPEED ESTIMATION WITH SINGLE-LOOP OUTPUTS
• GENETIC ALGORITHMS FOR TRAFFIC SIGNAL CONTROL AND QUEUE MANAGEMENT OF OVERSATURATED TWO-WAY ARTERIALS
• IMPACT OF EMERGENCY VEHICLE PREEMPTION ON SIGNALIZED CORRIDOR OPERATION: AN EVALUATION
• INTEGRATED TRAFFIC-RESPONSIVE URBAN CORRIDOR CONTROL STRATEGY IN GLASGOW, SCOTLAND: APPLICATION AND EVALUATION
• MAXIMUM POSSIBLE WEAVING VOLUME FOR EFFECTIVE OPERATIONS OF RAMP-WEAVE AREAS: ONLINE ESTIMATION
• NEW PROCEDURE FOR DETECTOR DATA SCREENING IN TRAFFIC MANAGEMENT SYSTEMS
• PROGRESSIVE DEPLOYMENT STEPS LEADING TOWARD AN AUTOMATED HIGHWAY SYSTEM
• REMOTE SIMULATION TO EVALUATE REAL-TIME TRAFFIC CONTROL STRATEGIES
• SCOOT REAL-TIME ADAPTIVE CONTROL IN A CORSIM SIMULATION ENVIRONMENT
• SIGNAL COORDINATION AND ARTERIAL CAPACITY IN OVERSATURATED CONDITIONS
• TRAFFIC SIGNAL COORDINATION ACROSS JURISDICTIONAL BOUNDARIES: FIELD EVALUATION OF EFFICIENCY, ENERGY, ENVIRONMENTAL, AND SAFETY IMPACTS