State Highway 121 in Collin, Dallas
and Denton counties
Click the map to view a large map of SH 121 in Collin, Dallas and Denton counties.
State Highway (SH) 121 extends northeasterly from State Highway 121 Business near the Dallas/Denton County line to U.S. 75 in Collin County, a total length of approximately 26 miles. Since 2007, the North Texas Tollway Authority (NTTA) and the Texas Department of Transportation (TxDOT) have worked together on the toll road that passes through the cities of Allen, Carrollton, Coppell, Fairview, Frisco, Lewisville, McKinney, Plano and The Colony.
PUBLIC MEETING HELD JUNE 16, 2008
The NTTA conducted a public meeting on June 16 to discuss proposed design
enhancements for the interchange at SH 121/ U.S. 75. For more information, click here.
Frequently Asked Questions about these enhancements are available here.
To see the proposed interchange configuration, please click here.
View a map showing the SH 121/ U.S. 75 interchange design that was approved in 2005.
View a map showing the SH 121/ U.S. 75 interchange design currently proposed by the NTTA.
More about SH 121:
When all construction is complete (expected in January 2012), the SH 121 toll road will feature six main lanes and all-electronic toll collection gantries. There will be no cash option available. Motorists will be able to use the toll road with their NTTA-issued TollTag, a TexasTollway TxTag, or an EZ TAG from the Harris County Toll Road Authority. Customers who use the toll road without a transponder will receive a bill from the NTTA. Cameras at various entrances and exits along the toll road will take a picture of your license plate and the vehicle owner will be mailed an invoice.
The SH 121 Project is divided into five segments all in various stages of development from planning and design to open to traffic.
Segment 1, from Denton Tap Road to Old Denton Road is open to traffic and the NTTA is responsible for interim tolling operations.
Segment 2 runs from Old Denton Road to Hillcrest Road and is currently under construction by TxDOT. The anticipated opening of this segment is September 2008. When Segment 2 opens to traffic, the NTTA will take full responsibility for Segments 1 and 2 as well as the operation, maintenance and construction of the remaining segments of SH 121.
NTTA contractors began work on Segment 3 of the SH 121 project in March 2008. Segment 3 stretches from Hillcrest Road to Hardin Boulevard near U.S. 75. The anticipated completion date for Segment 3 is January 2010.
Segment 4 consists of the area that encompasses the SH 121/ U.S. 75 interchange, from Lake Forest Drive to just east of U.S. 75. Opening for this portion of the roadway is anticipated in January 2011.
The interchange at SH 121 and the Dallas North Tollway is referred to as Segment 5 of the SH 121 Project. The anticipated completion date for Segment 5 is January 2012.
Motorists have been using Segment 1 of the SH 121 project (Denton Tap Road to Old Denton Road) since July 2006 when this portion of the toll road was opened to traffic. On April 5, 2008, the NTTA assumed responsibility for toll collection and other back-office support functions.
All passenger cars are charged the same toll rates as were charged by TxDOT’s Texas Tollways program. However, other vehicle classes are charged slightly different rates because the NTTA uses an axle-based billing system and Texas Tollways uses a shape-based system. For example, a school bus would be a larger shape under the Texas Tollway system, but is a two-axle vehicle under the NTTA’s system of billing.
For a complete listing of toll rates, please click here.
Work continues on the SH 121 project. To get a status report on current efforts to complete the roadway, please click here to view this month’s SH 121 progress report. |