2018 WILMAPCO Congestion Management Process

The Congestion Management Process (CMP) is a systematic and regionally-accepted approach for managing congestion that provides accurate, up-to-date information on transportation system performance and assesses alternative strategies for congestion management that meet State and local needs. The CMP and planning for operations are frequently combined in metropolitan regions. The strategies that come from a CMP are often M&O strategies. The CMP uses an objectives-driven, performance-based approach to planning for congestion management.
Through the use of congestion management objectives and performance measures, the CMP provides a mechanism for ensuring that investment decisions are made with a clear focus on desired outcomes. This approach involves screening strategies using objective criteria and relying on system performance data, analysis, and evaluation.

Interactive webmaps on current congestion conditions in the WILMAPCO region:

2018 CMP Performance Measure & Identified Corridors 2018 CMP: Corridor Signal Timing Improvements 2018 CMP: Other Mitigation Strategies and Programmed/RTP Projects 

CMP Corridor Profiles: Coming soon
The following link give a detailed look at each of the key corridors in the WILMAPCO region and their operations during the day (6am-10pm). Each corridor is broken down into 15min. intervals, measuring the Travel Time Reliability (TTR) for each of the available roadway segments.

US 202 (TTR Animation) (Speed Animation) US 40 DE 896
SR 2Kirkwoood Highway DE 7 (Limestone Rd.) US 13
SR 4 (East)(West) DE 273 MD 213

Corridor Signal Timing Before-and-After Travel Time and Emissions Analyses

Compliance with National Performance Measures
Transportation Performance Management (TPM) as a strategic approach that uses system information to make investment and policy decisions to achieve national performance goals. In short, Transportation Performance Management:

  • Is systematically applied, a regular ongoing process
  • Provides key information to help decision makers allowing them to understand the consequences of investment decisions across transportation assets or modes
  • Improving communications between decision makers, stakeholders and the traveling public.
  • Ensuring targets and measures are developed in cooperative partnerships and based on data and objective information

To see details of the performance measures for the WILMAPCO region, please see Appendix H of the Transportation Improvement Program

2014 WILMAPCO CMP Intersection Operations Analysis

The 2014 Intersection Operations Analysis is an outgrowth of the CMP process. It focuses upon the arterial roadway network and analyzes the current performance of the signals along all arterial roadways in New Castle County according to the FHWA’s functional classification system. The goal of the analysis is to:

  • Produce a regional delay/capacity analysis for signalized intersections along the arterial network.
  • Identify which intersections have reached a point of limited capacity available to function efficiently.
  • Prioritize intersections which need capital improvement, minor adjustments, or can still be addressed through signal timing efforts.

Monitor the status and timing of any capital improvements scheduled along with the implementation of Traffic Responsive Signalization (TRS) technology to the identified corridors. This document is to serve as a way to update the decision-makers and members of the public on the progress that is being made.

Key Corridors
Identified in
Operations Analysis
1. Kirkwood

2. US 202
3. Cleveland
4. SR 896
5. Old Baltimore

6. SR 273
7. SR 72
8. US 40
9. SR 4
10. US 13
11. SR 141
12. SR 7

Traffic responsive Signalization:

Traffic Responsive Signalization(or TRS) is a method of signal management that uses advanced technology to adjust timing to meet the needs of the current traffic volume.  The signals used in this method optimize signal timing according to traffic volume in each direction.  Sensors are used to detect vehicular traffic in a certain direction at a particular point and an algorithm is used to predict when and where the traffic will be.  The signal controller utilizes these algorithms to adjust the length of green time to allow the maximum amount of vehicles through the intersection.  This method can react to fluctuating traffic volume in order to reduce congestion.


Through coordination with the DelDOT, TMC and WILMAPCO, an effort was made to use the performance measures developed through the corridor identification process to help the operations community to prioritize their efforts to address the corridors which are in need of installing traffic signal improvements, including retiming and/or installing TRS equipment. To view which corridors in New Castle County, please click on one of the links below:

 2014 New Castle County Intersection Operations Analysis:

The main goal of the Wilmington Area Planning Council’s (WILMAPCO) Congestion Management System (CMS) report is a “systems” approach to identifying and addressing congestion in our region. With this approach, the existence of congestion in the transportation system can be seen in more of a regional (or national) context and it becomes apparent how slight changes at a specific location can impact the operation of the transportation system as a whole.


Entire 2012 CMS Summary (.PDF) 2014 New Castle County
Intersection Operations
Analysis (.PDF)