MIDCAP Maryland Intersection and Interchange Design & Capacity Analysis Program.

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Presentation transcript:

MIDCAP Maryland Intersection and Interchange Design & Capacity Analysis Program

INTRODUCTION Maryland Intersection and Interchange Design & Capacity Analysis Program (MIDCAP) Developed by University of Maryland, College Park and MDSHA A tool to conduct a capacity/ queuing analysis for signalized intersections and interchanges, signal warrant and shoulder bypass analysis at the preliminary, planning, or design stage Ok Ok Copyright ©2004-2014 ATTAP. All rights reserved.

MODULES Capacity and queue analysis Signal Warrant for signalized Intersections for signalized interchanges Signal Warrant Shoulder Bypass Lanes (SBLs) Warrant Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Uses the CLV method and MDSHA’s Queuing analysis procedure Provides the volume-to-capacity ratio and corresponding level of service associated with a particular intersection/interchange design, given hourly turning movement volumes, lane configurations, right turn restrictions, and phase control (split or non-split) Considers different types of intersection/interchange from conventional design (4 leg, 3 leg, diamond intersection) to unconventional design (Continuous Flow Intersection, Single Point Urban Interchange, and Diverging Diamond Interchange) Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Framework Movement volumes Lane configuration Intersection type Right-turn restriction INPUT Determine critical movement and calculate intersection CLV Calculate CLV for each approach Calculate v/c and determine LOS Calculate Max. queue length Intersection Critical Lane Volume Intersection v/c and LOS Maximum Queue Length OUTPUT Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS User-friendly interface 1 Choose Intersection Type 3 Set Lane Configurations 2 2 6 1 Input Movement Volumes 3 4 Choose Right Turn Control Type 4 5 Calculate Critical Lane Volume 5 Obtain Intersection LOS & V/C 6 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Multiple intersections analysis Corridor analysis Up to 10 intersections Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Integration of intersection and interchange designs On the multiple intersection analysis Intersections Interchange Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Analysis for both AM and PM peak hours at a time Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Multi-hour analysis Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Import a report from Internet Traffic Monitoring System (I-TMS) as traffic volume input Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Factors and Criteria Editable Lane Use Factors, LOS criteria, and PCE values Can be applied in different intersections and different approaches Default values (see tables) Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Right turn restriction Percentage of no-turn-on-red traffic Free right turn Right turn overlap Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Comparison summary Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Recommended bridge length for DDI design Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Different intersection and interchange designs Full CFI Symmetric CFI Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Different intersection and interchange designs Asymmetric CFI CFI-T Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 1: CAPACITY AND QUEUE ANALYSIS Different intersection and interchange designs SPUI DDI Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT Uses the Maryland Manual on Uniform Traffic Control Devices (MUTCD) 2011 edition Investigates the need for a traffic control signal by analyzing related factors such as traffic conditions and physical characteristics of the location Provides whether the following traffic signal warrant is satisfied at a particular location or not Warrant 1. Eight-Hour Vehicular Volume Warrant 2. Four-Hour Vehicular Volume Warrant 3. Peak Hour Warrant 9. Intersection Near a Grade Crossing Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT User-friendly Interface Import a turning movement report from Internet Traffic Monitoring System (I-TMS) as input 1 Load Traffic volume data Set Location-specific Characteristics 2 2 Click Calculate button 3 3 1 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT User-friendly Interface Evaluation results for Warrant 1 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT User-friendly Interface Evaluation results for Warrant 2 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT User-friendly Interface Evaluation results for Warrant 3 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 2: SIGNAL WARRANT User-friendly Interface Evaluation results for Warrant 9 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 3: SHOULDER BYPASS LANES(SBLs) Using the MDSHA’s application and design guidelines for shoulder bypass lanes (SBLs) Investigates the need for shoulder bypass lanes and left-turn lanes by analyzing related factors such as traffic conditions and physical characteristics of the location Provides whether the following shoulder bypass lane warrant is satisfied at a particular location or not Warrant 1. Vehicular Volumes Warrant 2. Stopping Sight Distance Warrant 3. Accident History Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 3: SHOULDER BYPASS LANES(SBLs) User-friendly Interface 1 Input Traffic volume data 1 Set Location-specific Characteristics 2 2 3 Click Calculate button 3 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 3: SHOULDER BYPASS LANES(SBLs) User-friendly Interface Evaluation results for Warrant 1 Copyright ©2004-2014 ATTAP. All rights reserved.

MODULE 3: SHOULDER BYPASS LANES(SBLs) User-friendly Interface Evaluation results for Warrant 2 and Warrant 3 Copyright ©2004-2014 ATTAP. All rights reserved.