Before a project is built, a study must be done to determine if it will fill a transportation need, will not negatively impact the surrounding area and fits the department's overall plan. During the study phase, potential projects are analyzed to determine if they are cost effective, while also efficiently improving mobility. Some of these projects have moved beyond the study phase and are under construction.
Proposed Projects
| Location | Project | Description |
| San Antonio | Loop 1604 from Lower Seguin Rd. to IH-10 | Mobility and safety improvements that include widening the roadway, replacing bridges and improving intersections. |
| San Antonio | IH 10 from Dominion Drive to Fair Oaks Parkway | Construct grade separation, intersection operational improvements and ramp reconfigurations, widen and convert frontage roads to one-way |
| San Antonio | IH 35 NE Operational Improvements | Reconstruct and reconfigure intersections, ramps, frontage roads, and main lane operations |
| San Antonio | Austin-San Antonio Commuter Rail | A feasibility study of a passenger rail system between Austin and San Antonio |
| San Antonio | Loop 1604 at Marbach Road | Construct a grade separation on Loop 1604 at Marbach Road |
Active Projects
| Location | Project | Description |
| San Antonio | Wurzbach Parkway | Construct a third east-west corridor option in addition to Loop 410 and Loop 1604 |
| San Antonio | US 281 and Loop 1604 Intersection | Construct four non-toll direct connectors that will link U.S. 281 on the south side of Loop 1604 |
| Boerne | RM 474 | Improvements to safety and traffic flow near Boerne High School |
| San Antonio | Fredericksburg Road/Medical Center | Expands Medical drive to four lanes at Fredericksburg Road |
| San Antonio | Loop 1604 at SH 151 Underpass | Construct an underpass linking Alamo Ranch Parkway with SH 151, under Loop 1604 |
| San Antonio | IH 10 | Expand from a six lane expressway to an eight lane expressway |