Collin County Outer Loop

Collin County ranks as one of the top growth areas in the state and the nation. Since the 2000 census, the county's population grew more than 52 percent by 2009, including massive private and commercial development. In that light, Collin County officials continue to evaluate and prepare for the next major outer-loop thoroughfare.

In December 2002, Collin County initiated the Outer Loop Alignment Study to develop various alignments within and along a 3,000-foot-wide corridor. The study identified a locally preferred alignment in order to determine right-of-way needs for the road to be built when the time comes.

Most recently, Commissioners approved contracts with local engineering firms to refine the technically preferred alignment and finalize the engineering design of several segments of more than 50 miles of Collin County’s portion of the regional outer loop.

Additional information and project study maps regarding the Collin County Outer Loop Alignment Study can be viewed by clicking the links below.

Outer Loop Overview

Outer Loop at U.S. 75 Interchange Preliminary Engineering Study

Concept Plan Design

Sept. 21, 2015, Collin County Toll Authority Board Meeting:

Preliminary Engineering Technical Presentation by HNTB
Environmental Document Presentation by NCTCOG
Approved Local Environment Document, Sept. 21, 2015

Segment 1: U.S. 75 to S.H. 121 (in Melissa)

Segment 1: Technically Preferred Alignment (November 2006)
Segment 1: Local Environmental Document
Segment 1: 2-lane Service Road Plans
Segment 1: 2-lane Service Road Construction Phase Sheets

Segment 2: FM 6 to Rockwall County line

Segment 2: Technically Preferred Alignment Approved for Public Meetings (Updated September 2010)
Segment 2: Technically Preferred Alignment Approved for Public Meetings (July 2009)
Segment 2: Environmental Contraints

September 17, 2009 Nevada, TX:
Segment 2 and 4 Alignment Presentation at Community High School

Segment 3: Dallas North Tollway to U.S. 75

NEW as of December 2019: Construction of a two-lane service road from the Dallas North Tollway to just east of State Highway 289 is underway. This effort includes a grade separated crossing at the BNSF railroad located west of State Highway 289. Anticipated completion is late 2020 or early 2021. Design is in progress for the construction of a two-lane service road from State Highway 289 east to U.S. 75. Construction between State Highway 289 and F.M. Highway 2478 will begin in late 2020. Right-of-way acquisition for the section between F.M. Highway 2478 and U.S. 75 will begin during the summer of 2020. Additionally, schematic design for the entirety of Segment 3 from the Collin/Denton County line is in progress. Schematics for the section between the Collin/Denton County line east to F.M. 2478 are complete. Schematics for the section between F.M. 2478 and U.S. Highway 75 are in final review. Please contact the Engineering Department Staff for more details, 972-548-3727. View the maps below:

Outer Loop Seg. 3 Schematic 1
Outer Loop Seg. 3 Schematic 2
Outer Loop Seg. 3 Schematic 3
Outer Loop Seg. 3 Schematic 4
Outer Loop Seg. 3 Schematic 5
Outer Loop Seg. 3 Schematic 6

December 2017: Design is ongoing for the construction of a two-lane service road from the Dallas North Tollway to just east of SH 289. This effort includes the Preliminary Engineering Concept Design for the Interchanges at the Outer Loop and Dallas North Tollway and the Outer Loop at SH 289. These Interchange Concept Designs are for the purpose of Right of Way acquisition only. Additionally, schematic design for the entirety of Segment 3 from the Collin/Denton County line is in progress. Please contact the Engineering Department Staff for more details, 972-548-3727.

In October 2017 a public meeting was held to present a revised alignment for the portion of Segment 3 located between SH 289 and US 75. Commissioners Court approved this alignment in December 2017.

Oct. 2, 2017: Open House Public Meeting Summary

Approved alignment from SH 289 to US 75, Exhibit 1
Approved alignment from SH 289 to US 75, Exhibit 2
Approved alignment from SH 289 to US 75, Exhibit 3
Approved alignment from SH 289 to US 75, Exhibit 4

Segment 3: Technically Preferred Alignment (updated August 2012)

Oct. 27, 2015: Open House Public Meeting
Open House Public Meeting Summary
Segment 3a Open House Public Meeting Comment form
Segment 3a, 2-lane Service Road Schematic
Outer Loop at Dallas North Tollway Concept Design
Outer Loop at S.H. 289 Concept Design (updated January 2019)

Aug. 6, 2012, Public Hearing
Segment 3: SH 289 to FM 2478 Presentation
Segment 3: SH 289 to FM 2478 Alignment Alternatives
Segment 3: SH 289 to FM 2478 Approved Technically Preferred Alignment
Public Comment Form
Combined Final Report