Construction on the western side of Loop 49 began with Segment 3A, which extends from SH 155 (Frankston Hwy) to SH 31 (Chandler Hwy). This segment was constructed using federal funds from the American Recovery and Reinvestment Act of 2009, after the Texas Transportation Commission approved its status as a stimulus project on March 5, 2009. TxDOT awarded a $37.9 million construction contract three months later on June 10, and construction began in August. Segment 3A opened to traffic November 9, 2012, after approximately 39 months of construction. In an effort to speed completion of the west side of Loop 49 and connect it to Interstate 20, the NET RMA approved a plan in August 2009 to develop Segment 3B, the longest section of the toll road at , using a nontraditional "design/build" process. On October 28, 2010, the Texas Transportation Commission approved up to $90 million for the construction of Segment 3B through State Infrastructure Bank loans and a toll equity loan. Construction on Segment 3B began on January 21, 2011, and the segment opened to traffic on March 28, 2013, completing the loop from I-20 to SH 110.