New Castle County is the most populous county in Delaware with about 570,000 residents. The City of Wilmington, University of Delaware, and many other centers of activity are in the northern part of the county, close to the I-95 corridor. The area south of the C and D Canal sustains most of the county's agricultural activity but also continues to develop and grow with new residential neighborhoods. Commuting, freight distribution, and other daily activities amount to hundreds of thousands of people traveling throughout New Castle County each day.

Using the statewide approach to identifying congestion hotspots the 2022 New Castle County TOMP identifies 12 areas in the county where congestion and its impact on mobility are most significant:

• DE 92, Foulk Road to US 13
• US 202, I-95 to PA Line
• Northwest of Wilmington, DE 48 and DE 52
• DE 2, DE 72 to DE 41
• Newark Area
• Churchman's Crossing Area, DE 4 and DE 7
• I-95, DE I to DE 141/I-295
• New Castle Area, US 13 and DE 273
• DE 896, I-95 to Porter Road
• US 40, MD line to DE 1
• DE 72, US 40 to DE 1
• DE 299 in Middletown

The plan provides strategies to address mobility, including a range of intersection adjustments, adding lanes, evaluating/adjusting pedestrian crossings, general travel demand management strategies, and various integrated transportation management system enhancements.

The New Castle County TOMP is a product of collaboration with stakeholders, including WILMAPCO-the county's federally designated metropolitan planning organization. WILMAPCO's congestion management process is closely coordinated with the current TOMP, which builds on the findings from the 2010 New Castle County TOMP and draws from DelDOT's expanded integrated transportation management system (ITMS).