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This page last updated November 11, 2026 |
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This project is currently in design The project below is still in design. Descriptions below are based on schematics released on November 10th, 2026, but details may change before the project goes to construction. |
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Location
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Timeline
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Project description and background
In 2000, TxDOT announced plans to upgrade US 281 in Bexar County to a non-tolled, six-lane freeway from Loop 1604 to Stone Oak Pkwy., and to build a standalone overpass at Borgfeld Dr., with long-term plans to upgrade 281 to a full freeway in phases all the way to FM 306 at the Comal/Blanco county line. However, due to rapid construction cost increases that developed suddenly around 2003 that resulted in funding shortages for planned highway projects, the state required new freeway projects to use tolls where possible, so the 281 expansion project from Loop 1604 to Stone Oak was changed to include tolled mainlanes. This sparked a decade-long battle with toll road opponents that delayed the project multiple times. When additional traditional funding became available in the mid 2010s, that project finally got underway in 2017 as a non-toll project and was completed in phases between 2021 and 2023.
- Close all crossovers along this stretch
- Add one-way access roads and entrance and exit ramps on each side of 281
- Upgrade the existing lanes to become the freeway mainlanes and add one HOV lane in each direction
- Make improvements to the existing overpasses at SH 46 and FM 1863
- Construct a new overpass at Mustang Vista
- Build a short extension of Mustang Vista to the west of US 281 to connect to an extension of Short Hill to allow traffic from Casey Rd. to cross US 281, and to allow traffic from northbound US 281 to reach Casey Rd. without having to turn around at SH 46
- Widen FM 1863 between US 281 and Wiley Rd. to six lanes (i.e. three lanes each direction) with a raised median and make improvements to the existing intersections at US 281 and FM 1863
- Add a southbound access road north of SH 46 to just north of Flightline Rd.
- Build sidewalks throughout the project
Additional right-of-way will be required. However, the new center median will be built wide enough to accommodate future widenings or other transportation improvements without having to expand the footprint further.
BEXAR COUNTY LINE AND SH 46
BEXAR COUNTY LINE AND SH 46
FAQ
- Will this project be tolled?
No. Although earlier versions of the US 281 expansion in Bexar County included tolled lanes, funding was secured to remove the toll component from that project, and planning for the expansion in Comal County had never progressed to the point where a decision on tolls would have had to be made. With tolling now deprecated, this project is expected to include non-tolled freeway mainlanes and access roads. - Will this project have HOV lanes?
In the 2021 plans, HOV lanes were not included. However, the 2026 revised plans now include extending the HOV lanes in Bexar County north along this section. - The plans show two mainlanes in each direction, but there are already two lanes in each direction here, so how is this an improvement?
This is a common misconception because it is not an apples-to-apples comparison. Yes, this section of 281 does indeed have two lanes each way today and will only have two mainlanes each way when this project is complete. However, those two future mainlanes will be freeway mainlanes, not surface road lanes as they are today. Since freeway mainlanes do not have signalized intersections, they can carry about twice as many vehicles than surface road lanes can. Therefore, the two freeway lanes are roughly equivalent to four of the existing lanes.
Also, a non-trivial amount of the traffic in that area is headed to or from the intersecting roads, neighborhoods, or frontage businesses, and will therefore be on the access road lanes, not on the freeway mainlanes. Access road lanes are surface road lanes, so with a minimum of two access road lanes in each direction (and three along most stretches), that adds two to three more lanes in each direction to the corridor.
Lastly, the HOV lanes also add another freeway lane in each direction, which, as mentioned, is the equivalent of two surface lanes.
When you add those up, the new lanes will be approximately equivalent to eight or nine of the existing surface road lanes in each direction, which quadruples the number of lanes that are there today. Even if you just count the raw number of lanes and don't account for the capacity differences for the types of lanes, there will still five to six lanes in each direction (two mainlanes, one HOV lane, and two to three access road lanes) as opposed to just the two lanes there today. - Okay, but there needs to be more than two general mainlanes in each direction — two lanes will soon result in congestion.
Planners look at current and projected traffic volumes to determine the number of lanes to build. The planning timeline is typically 20-25 years, which is the longest that estimates can be considered reliable, and it's also the general lifespan of a road before it needs major updates or reconstruction anyway.
Although nobody has a crystal ball and can tell what traffic volumes will be two decades from now, and future traffic projections have to make assumptions that may well not hold up, those projections currently indicate that those two general-purpose mainlanes will be sufficient. It's worth noting that the recently completed section of US 281 in Bexar County, which has the same lane configuration, does not experience any significant recurring congestion.
It's also worth noting that the median will be paved as part of this project to expedite adding additional lanes in the future.
Schematic
Click on the image below to open the detailed schematic for this project from TxDOT with my own annotations added to help clarify and explain the various elements. The schematic will open in a new window that you can scroll and zoom.
Note that this schematic is preliminary and subject to change.
Video
TxDOT has a good video that describes this project:
Other sites of interest
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TxDOT - US 281 South Comal https://www.txdot.gov/ |