The initial $1 billion DFW Connector project was simultaneously designed and built along 8.4 miles of SH 114 and SH 121 in Grapevine, Southlake and Irving. It doubled the size of the existing highway system around the north entrance of DFW International Airport. The project featured a combination of new mainlanes, frontage road lanes and TEXpress Lanes. The initial project completed in March 2014.
Funding constraints required some original DFW Connector segments to be deferred. However, in early 2013, TxDOT was able to secure funding for the FM 2499 section and in September 2014, funding for new SH 121 and SH 360 ramps and in February 2016, funding for improvements to the SH 121/360 interchange.
The SH 121/360 ramps project constructed new on-ramps from the southbound SH 121 frontage road (William D. Tate Avenue) to SH 121 and SH 360. Construction started in early 2015 and completed in November 2015, a year ahead of schedule.
FM 2499 work included building two new mainlanes in each direction on FM 2499 from SH 121 to Denton Creek. These new lanes were built below grade level and allow commuters to bypass the intersections of Stars and Stripes Way and Grapevine Mills Boulevard. The project was completed in 2016, six months ahead of schedule.
As part of the Texas Clear Lanes initiative, TxDOT secured congestion relief funding in 2016 for the SH 121/360 interchange, and in 2017 for the SH 121 interchanges at I-635 and FM 2499.
The SH 121/360 interchange improvements include new direct connectors for SH 114, SH 121 and SH 360. Construction on the direct connectors began in August 2016 and is expected to reach substantial completion in late 2018. The SH 121 interchanges at I-635 and FM 2499 began construction in August 2018.