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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

Tracking Changes in Traffic during CoVID-19
WILMAPCO has been actively tracking the changing traffic conditions brought on by the CoVID-19 Pandemic. The materials below will be updated as conditions warrant.


Progress and Actions Toward Achieving TPM Targets
The CMP provides a mechanism for ensuring that investment decisions are made with a clear focus on the three main goals of the RTP. To accomplish this, the system performance analysis from the CMP provides objective screening criteria for project evaluation. The interactive webmaps below current congestion conditions in the WILMAPCO region and mitigation strategies being applied to our key corridors.

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

CMP Corridor Profiles:

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 40
(Travel Reliability Animation)
(Speed Animation)
DE 896
SR 2- Kirkwoood 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 Analysis

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)