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I-35 Ohter San Antonio Area Roads
I-35 Comal County Projects

This page last updated February 19, 2019

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I-35 Comal County projects map


TxDOT has several projects in the works for I-35 in Comal County to improve/reconfigure intersections and overpasses, adjust or reverse entrance and exit ramps, and convert the access roads to one-way operation where they are currently two-way. This page contains information about these projects. 

The descriptions below are based on preliminary schematics and, as a result, details may change. This page will be updated when final schematics for each project are available.

To date, the first two projects listed on this page have been approved to start construction in 2019. The third project listed is currently not scheduled and may be divided into one or more additional projects.

Note that none of these projects will add any new through mainlanes to I-35 itself-- planning is underway for future projects to do that. However, these projects do include the construction of several new or reconstructed overpasses on I-35 itself.

Note that some of the changes shown in the schematic near FM 1103 are actually from the preliminary designs for the I-35 NEX project and are anticipated to be done as part of that project; they are shown in these plans to provide context for how that future project relates to the changes to be made in the first project on this page.

Some of the descriptions below include snippets of the schematic; full schematics are at the bottom.

On this page:


1   FM 2252 to Schwab Road

Status: Anticipated start Spring 2019

Description:
This project will do the following:

  • Reverse the entrance and exit ramps between FM 2252 and FM 1103 (i.e. switch the existing exit ramps to entrance ramps and vice-versa.)
  • Change the existing northbound entrance ramp from FM 1103 to an exit ramp for Schwab Rd. This will also provide more direct access to the Northcliffe and Homestead subdivisions. An auxiliary lane from the new entrance ramp south of FM 1103 and this exit ramp will be added.
  • Move the northbound entrance ramp from FM 1103 to just past Covers Cove. An auxiliary lane on the access road between the preceding exit ramp and this entrance ramp will be added.
  • Move the southbound entrance ramp from Schwab Rd. to just south of the old rest area (i.e. across from Country Club Blvd.)
  • Construct two park & pool lots where the old rest areas used to be. These will be accessed via the frontage roads. (These were not included in the original plans.)
  • Move the southbound exit ramp to FM 1103 to just north of the old rest area. An auxiliary lane on the access road between this ramp and the entrance ramp in the previous point will be added.
  • Expand the Schwab Rd. intersection to accommodate new turnarounds as well as a future planned widening of Schwab Rd. This will require lengthening the existing I-35 overpasses. To do so while maintaining traffic flow on I-35, the new overpasses will be built slightly further to the outside of the existing ones; this will result in a slight outward bowing of I-35. The space in the middle will be used in a future expansion of I-35.


Schwab Rd. interchange


2   FM 306 to the Hays County Line

Status: Anticipated start Fall 2019

Description:
This project will do the following:

  • FM 306 intersection and vicinity
    • Reconfigure the FM 306/I-35 intersection into a partial Displaced Left Turn (DLT) for westbound FM 306. (See schematic below.) This is similar to the DLT at Aquarena Springs Dr. and I-35 in San Marcos.
    • Extend the dedicated right turn lane on westbound FM 306.
    • Improve the right turns on the northbound access road into New Braunfels Town Center, and install a concrete island to prevent traffic from the turnaround from turning into the first two driveways.
    • Widen the access roads in both directions to three lanes between FM 306 and Conrads Lane.


FM 306 partial Displaced Left Turn (DLT) intersection
  • Conrads Lane/Kohlenberg Rd. intersection and vicinity
    • Completely rebuild the Conrads Lane/Kohlenberg Rd. interchange as a more standard intersection. The existing overpass and loop ramps will be removed and replaced with an overpass for I-35 over a new at-grade four-lane road (plus turn lanes) that connects Conrads to Kohlenberg. (See schematic below.)
    • Convert the access roads north of Conrads/Kohlenberg to one-way and expand to three lanes (nominally.)
    • Remove the existing northbound entrance ramp from and southbound exit ramp to Conrads/Kohlenberg and replace with a new northbound exit ramp and southbound entrance ramp just north of there.
    • Construct a new northbound entrance ramp from and exit ramp to Conrads/Kohlenberg roughly 8/10th of a mile north of the existing ramps.


Conrads Lane/Kohlenberg Rd. intersection
  • Watson Lane area
    • Build a new turnaround interchange about halfway between Conrads/Kohlenberg and Watson Lane West; this will provide a more convenient crossover/turnaround location between those intersections once the access roads are converted to one-way. This is also the location for a future thoroughfare listed in the New Braunfels Regional Transportation Plan and space will be left for that roadway.
    • Relocate the northbound exit ramp to Watson Lane slightly further south.
    • Relocate the southbound entrance ramp from Watson Lane across from Watson Lane East, convert the existing southbound entrance ramp from Watson Lane to an exit ramp, and construct a new northbound entrance ramp across from the new exit ramp.
    • Demolish the existing Watson Lane overpass, and straighten the access roads in the vicinity.
    • Construct a new intersection for I-35 at Watson Lane West. An overpass for I-35 will be built, and Watson Lane extended under the new overpass to the northbound access road. The intersection will also include turnarounds.
    • Convert the existing northbound entrance ramp from Watson Lane to an exit to FM 1102/York Creek Rd.
    • Convert the existing southbound exit ramp to Watson Lane to an entrance ramp from FM 1102/York Creek Rd.
    • Construct a new southbound exit for Watson Lane near the existing entrance ramp from FM 1102/York Creek Rd and remove the entrance ramp.
    • Construct a new northbound entrance from Watson Lane near the existing exit ramp to FM 1102/York Creek Rd and remove the exit ramp.
    • Convert access roads to one-way.

  • FM 1102/York Creek Rd. intersection
    • Completely rebuild the FM 1102/York Creek Road interchange as a more standard intersection. The existing overpass and access ramps will be removed and replaced with an overpass for I-35 over a new at-grade four-lane road (plus turn lanes) that connects FM 1102 to York Creek Rd. This reconfiguration will also realign the I-35 roadway into the existing wide median at that location.
    • Convert access roads to one-way. The access roads north of FM 1102 will be converted to one-way in conjunction with a separate project north of the Hays County Line that will revamp the Posey Road interchange. That project is set to start construction in early 2019. Once these projects are completed, all of the I-35 access roads from San Antonio to Austin will be one-way.


FM 1102/York Creek Rd. intersection


3   Schwab Road to FM 306

Status: Unfunded; no estimated start date

Description:
This project
will do the following:

  • Engel Rd. intersection and vicinity
    • Change the existing northbound entrance ramp from Schwab Rd. to an exit ramp for Engel Rd., and change the existing southbound exit ramp to Schwab Rd. to an entrance ramp from Engel Rd.
    • Construct the northbound entrance ramp from Schwab Rd. about a mile north of Schwab (in front of the classic car showroom), remove the existing northbound exit to Engel Rd., and convert the existing southbound entrance ramp from Engel Rd. to an exit for Schwab Rd.
    • Realign the northbound access road approaching Engel Rd. slightly inward toward the freeway.
    • Replace the existing Engel Rd. intersections with roundabouts ("dogbone interchange") and add turnarounds. This will require lengthening the existing I-35 overpasses. Like at Schwab Rd., the new overpasses will be built slightly further to the outside of the existing ones resulting in a slight outward bowing of I-35 with the space in the middle to be used in a future expansion of I-35. (See schematic below.)
    • Replace the existing northbound entrance ramp from Engel Rd. with an exit ramp for Solms Rd., and replace the existing southbound exit to Engel Rd. with an entrance ramp from Solms Rd.
    • Construct the new northbound entrance ramp from and the southbound exit to Engel Rd. about 8/10th of a mile north of Engel, build an auxiliary lane on the access roads between these ramps on the ones in the previous point, and remove the existing ramps just south of Solms Rd.


Engel Rd. "dogbone" interchange
  • Solms Rd. intersection and vicinity
    • Widen the Solms Rd. overpass to four lanes and construct turnarounds.
    • Replace the existing northbound entrance ramp from Solms Rd. with an exit ramp for Loop 337/FM 482/Rueckle Rd., and replace the existing southbound exit to Solms Rd. with an entrance ramp from Loop 337/FM 482/Rueckle Rd.
    • Replace the existing northbound exit ramp to Loop 337/FM 482/Rueckle Rd. with an entrance ramp from Solms Rd., and replace the existing southbound entrance ramp from Loop 337/FM 482/Rueckle Rd. with an exit to Solms. Rd. An auxiliary lane on the access roads between these ramps on the ones in the previous point will be added.

  • Loop 337//Rueckle Rd. intersection and vicinity
    • Widen the Loop 337/Rueckle Rd. overpass to four lanes in each direction (two through, two left turn) and construct turnarounds.
    • Replace the existing northbound entrance ramp from Loop 337/FM 482/Rueckle Rd. with an exit ramp to BL 35/FM 1044, and replace the existing southbound exit ramp to Loop 337/FM 482/Rueckle Rd. with an entrance from BL 35.
    • Replace the existing northbound exit ramp to BL 35/FM 1044 with an entrance ramp from Loop 337/FM 482/Rueckle Rd., and replace the existing southbound entrance ramp from BL 35 with an exit ramp to Loop 337/FM 482/Rueckle Rd. An auxiliary lane on the access roads between these ramps on the ones in the previous point will be added.

  • BL 35 South/Schmidt Rd. intersection and vicinity
    • Add a third northbound lane on the approach to the BL 35 intersection.
    • Replace the existing I-35/BL 35/ Schmidt Rd. intersections with multilane roundabouts ("dogbone interchange"). The existing turnarounds will be retained. (See schematic below.)
    • Replace the BL 35/Hidalgo Ave./Spur St.,Lone Star Ave. intersection with a multilane roundabout.


BL 35 South "dogbone" interchange and roundabout
  • Walnut Ave. intersection and vicinity
    • Expand the Walnut Ave. intersection by adding an additional lane on all four approaches. This will result in two dedicated left-turn lanes and two dedicated through lanes on both directions of Walnut, and the addition of a dedicated right turn lane on both access roads.
    • Replace the existing southbound exit ramp to Walnut Ave. with an entrance ramp from FM 725/Seguin Ave., and replace the existing southbound entrance ramp from FM 725/Seguin Ave. with an exit ramp for Walnut Ave.

  • FM 725/Seguin Ave. intersection and vicinity
    • Add a double right-turn lane from the northbound access road to FM 725, add an additional through lane on westbound Seguin Ave. under I-35 (allowing the two left lanes to become a dedicated double left-turn), and add an additional through lane on the southbound access road. 
    • Add a dedicated right-turn lane on westbound Seguin Ave. at I-35 and at BL 35, and add a dedciated right-turn lane on eastbound Seguin Ave. at I-35.
    • Lengthen the northbound entrance ramp from FM 725/Seguin Ave.

  • SH 46/Loop 337 intersection and vicinity
    • Add an additional through lane on westbound SH 46 under I-35 (allowing the two left lanes to become a dedicated double left-turn). Add an additional through lane on the northbound and southbound access roads (allowing the two left lanes to become a dedicated double left-turn). Also add a dedicated right-turn lane on the northbound access road.
    • Add an additional lane in both directions of SH 46 between I-35 and BL 45. The westbound right lane will become a dedicated right-turn lane to BL 35, and the eastbound right lane will become a dedicated right-turn lane to I-35.

  • BL 35 North intersection and vicinity
    • Widen each direction of BL 35 under I-35 to three lanes to support a future expansion/extension of that road. This will result in a double left-turn lane on northbound BL 35.
    • Remove the existing northbound entrance ramp from and southbound exit ramp to BL 35.
    • Construct a new northbound exit ramp to FM 306 about 1/2 mile north of BL 35, and construct a new southbound entrance ramp from FM 306 across from it (i.e. in front of the Kawasaki dealer.) Remove the existing northbound exit to and southbound entrance from FM 306.
    • Slightly adjust the locations of the northbound entrance ramp from BL 35 and the southbound exit ramp to Post Road/BL 35.

Schematics

Click on one of the images below to open the corresponding 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.

FM 1103 to Guadalupe River



Click on the image above to open the schematic



Guadalupe River to Hays County Line



Click on the image above to open the schematic


Other sites of interest
TxDOT - I-35 Comal County Operational Improvements
https://www.txdot.gov/inside-txdot/get-involved/about/hearings-meetings/san-antonio/111517.html




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This page and all its contents are Copyright 2019 by Brian Purcell

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The information provided on this website is provided on an "as-is" basis without warranties of any kind either express or implied.  The author and his agents make no warranties or representations of any kind concerning any information contained in this website.  This website is provided only as general information.  The author expressly disclaims all liability with respect to actions taken or not taken based upon the information contained herein or with respect to any errors or omissions in such information.  All opinions expressed are strictly those of the author.  This site is not affiliated in any way with any official agency.