00936076

Component

https://doi.org/10.3141/1811-19

http://scholar.google.com...urth&publication_year=2002

A traffic control strategy was designed explicitly to accommodate bus priority on Avenida Ponce de Leon between Old San Juan and the northern terminus of the metro, Tren Urbano, now under construction in Puerto Rico. Up to 36 buses operate per hour in mixed traffic northbound and in an exclusive contraflow lane southbound. The control strategy is characterized as "highly interruptible" because it responds quickly to, and recovers quickly from, priority interruptions, which are expected to occur frequently. It features full actuation and schedule-based conditional priority for buses. Buses may request to pass through the intersection or to advance to the bus stop that may be occupied by a standing queue. Priority tactics include green extension, early green, and early red. To preserve capacity and encourage dwell time to overlap with traffic delay, bus blockage at a stop forces an early and minimum length red. There is no background cycle; however, loose progression is provided by means of requests, of lower priority than bus requests, from upstream intersections to force or hold green until a platoon arrives. The control strategy was programmed and tested with VISSIM, whose useful features and weaknesses for this study are described. The results indicate significant transit travel time savings without slowing general traffic compared with the existing strategy of fixed time control with progression.

This paper appears in Transportation Research Record No. 1811, Advanced Traffic Management Systems for Freeways and Traffic Signal Systems 2002.

English

p. 157-165

2002

Transportation Research Record

0309077370

Figures (3) ; References (13) ; Tables (1)

Bus priority; Bus transit; Dwell time; Highway capacity; Savings; Traffic delays; Traffic signal control systems; Travel time

VISSIM (Computer model)

Puerto Rico

Highways; Operations and Traffic Management; Public Transportation; I73: Traffic Control

TRIS, TRB, ATRI

Jan 8 2003 12:00AM

• ADAPTIVE SIGNAL CONTROL SYSTEM WITH ONLINE PERFORMANCE MEASURE FOR A SINGLE INTERSECTION
• AUTOMATIC REAL-TIME DETECTION AND CORRECTION OF ERRONEOUS DETECTOR DATA WITH FOURIER TRANSFORMS FOR ONLINE TRAFFIC CONTROL ARCHITECTURES
• DYNAMIC SIGNAL COORDINATION FOR NETWORKS WITH OVERSATURATED INTERSECTIONS
• EVALUATION OF RAMP CONTROL EFFECTIVENESS IN TWO TWIN CITIES FREEWAYS
• EVALUATION OF TRAFFIC FLOW ANALYSIS TOOLS APPLIED TO WORK ZONES BASED ON FLOW DATA COLLECTED IN THE FIELD
• FIELD OPERATIONAL TEST OF INTEGRATED FREEWAY RAMP METERING/ARTERIAL ADAPTIVE SIGNAL CONTROL: LESSONS LEARNED IN IRVINE, CALIFORNIA
• FREEWAY PERFORMANCE MEASUREMENT SYSTEM: OPERATIONAL ANALYSIS TOOL
• FREEWAY TRAVEL TIME PREDICTION WITH STATE-SPACE NEURAL NETWORKS: MODELING STATE-SPACE DYNAMICS WITH RECURRENT NEURAL NETWORKS
• INTEGRATED CONTROL STRATEGIES FOR SURFACE STREET AND FREEWAY SYSTEMS
• MOBILE SENSOR AND SAMPLE-BASED ALGORITHM FOR FREEWAY INCIDENT DETECTION
• MONITORING COMMUTER CONGESTION ON SURFACE STREETS IN REAL TIME
• OPTIMIZED POLICIES FOR ADAPTIVE CONTROL STRATEGY IN REAL-TIME TRAFFIC ADAPTIVE CONTROL SYSTEMS: IMPLEMENTATION AND FIELD TESTING
• OPTIMIZING TRAFFIC NETWORK SIGNALS AROUND RAILROAD CROSSINGS: MODEL VALIDATIONS
• PREDICTION OF TRAFFIC-ACTUATED PHASE TIMES ON ARTERIAL STREETS
• PROGRAM FOR OPTIMIZING DIAMOND INTERCHANGES IN OVERSATURATED CONDITIONS
• QUANTIFYING DELAY REDUCTION TO BUSES WITH SIGNAL PRIORITY TREATMENT IN MIXED-MODE OPERATION
• REALIZING BENEFITS OF ADAPTIVE SIGNAL CONTROL AT AN ISOLATED INTERSECTION
• TRANSFERABILITY OF A STOCHASTIC TOLL PLAZA COMPUTER MODEL
• USE OF LOCAL LANE DISTRIBUTION PATTERNS TO ESTIMATE MISSING DATA VALUES FROM TRAFFIC MONITORING SYSTEMS