00740626

Component

https://doi.org/10.3141/1572-16

http://scholar.google.com...mari&publication_year=1997

Models to estimate right-turn-on-red (RTOR) volumes at intersections with exclusive right-turn (RT) lanes are developed, and the effects of RTOR volumes on computed delay are assessed. The important variables in these models are the RT volume, followed by green-time-to-cycle (G/C) ratio, volume of conflicting traffic, and whether there is a protected phase for opposing left-turning vehicles. The estimated RTOR increased as the RTs increased. However, it decreased as G/C and the volume of conflicting traffic increased. Results show that not accounting for RTOR volumes can lead to a significant difference in delay estimates for RT lanes and, to a lesser extent, on the corresponding approaches. For RT lanes, in one-half of the cases the difference was greater than 5%, in more than one-quarter of the cases the difference was greater than 10%, and in at least one of eight cases the difference was greater than 20%. Differences for individual cases ranged between 0 and 130%, with an average of 12%. For approaches, the average delay difference was 4%, and for individual cases the difference ranged between -2% and 78%. As recommended by the "Highway Capacity Manual", actual field counts of RTOR volume should be used whenever available. However, in the absence of such counts, the models developed here can be used and hence should be considered in capacity analysis procedures.

This paper appears in Transportation Research Record No. 1572, Highway Capacity Issues and Analysis.

English

p. 131-139

1997

Transportation Research Record

0309061504

Figures (7) ; References (10) ; Tables (2)

Estimating; Right turn on red; Signalized intersections; Traffic delays; Traffic models; Traffic volume; Turning lanes

Highway Capacity Manual

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Sep 5 1997 12:00AM

• ANALYSIS AND EVALUATION OF THE CAPACITY OF ROUNDABOUTS
• ASSESSMENT OF ROADWAY CAPACITY ESTIMATION METHODS
• CAPACITY OF ROUNDABOUTS IN JORDAN
• COMPARATIVE ANALYSIS OF FRESIM AND 1994 HIGHWAY CAPACITY MANUAL MODELS FOR RAMP JUNCTIONS WITH AN INDEPENDENT DATA BASE
• DEVELOPMENT OF GUIDELINES BASED ON LIFE-CYCLE COST TO REPLACE LEVEL-OF-SERVICE CONCEPT IN CAPACITY ANALYSIS
• DEVELOPMENT OF PASSENGER CAR EQUIVALENTS FOR FREEWAYS, TWO-LANE HIGHWAYS, AND ARTERIALS
• EFFECT OF UPSTREAM SIGNAL ON NONPRIORITY MOVEMENT CAPACITY AND DELAY
• GENERALIZED DELAY MODEL FOR SIGNALIZED INTERSECTIONS AND ARTERIAL STREETS
• IMPROVED SPEED-FLOW RELATIONSHIPS FOR PLANNING APPLICATIONS
• INTERSECTION DELAY IN REGIONWIDE TRAFFIC ASSIGNMENT: IMPLICATIONS OF 1994 UPDATE OF THE "HIGHWAY CAPACITY MANUAL"
• OPERATIONAL PERFORMANCE MEASURES OF AMERICAN ROUNDABOUTS
• PERFORMANCE MEASURES IN "CANADIAN CAPACITY GUIDE FOR SIGNALIZED INTERSECTIONS"
• REVIEW AND EVALUATION OF METHODS FOR ANALYZING CAPACITY AT SIGNALIZED INTERSECTIONS
• SATURATION FLOWS AT SIGNAL-GROUP-CONTROLLED TRAFFIC SIGNALS
• TRAFFIC FLOW CHARACTERISTICS ON A THREE-LANE RURAL HIGHWAY IN FINLAND: RESULTS FROM EMPIRICAL STUDIES AND SIMULATIONS
• UNSIGNALIZED INTERSECTION ANALYSIS: EFFECT OF OVERLAPPING CONFLICTING TRAFFIC FLOW ON MINOR MOVEMENT POTENTIAL CAPACITY
• USING INPUT-OUTPUT DIAGRAM TO DETERMINE SPATIAL AND TEMPORAL EXTENTS OF A QUEUE UPSTREAM OF A BOTTLENECK
• UTILIZATION OF AUXILIARY THROUGH LANES AT SIGNALIZED INTERSECTIONS WITH DOWNSTREAM LANE REDUCTIONS
• VALIDATION OF GENERALIZED DELAY MODEL FOR OVERSATURATED CONDITIONS
• VALIDATION OF GENERALIZED DELAY MODEL FOR VEHICLE-ACTUATED TRAFFIC SIGNALS