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Other San Antonio Area Roads
I-35 Comal County Projects |
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This page
last updated May 12, 2023 |

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Some
of these projects are currently in design
One or
more of the projects below are still in design. Descriptions below for projects that have
not yet gone to construction are based on preliminary schematics and,
as
a
result, details may change before the projects go to construction. This
page will be updated when final schematics for each project are
available. |
TxDOT
has several projects underway or in the works along the I-35 corridor
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.
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 the I-35 mainlanes.
The
conversion of the access roads to one-way from Conrads Rd./Kohlenberg
Rd. north of New Braunfels to FM 1102/York Creek Rd. (project #4 below)
is the final project to convert all of the I-35 access roads to one-way from the Medina
River south of San Antonio all the way to Hillsboro.
Some
of the descriptions below include snippets of the schematic; full
schematics are at the bottom.
On
this page:
Status: Under construction
(started in July 2019 and is complete)
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.)
- 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.
- Construct
two "park & pool" (i.e. carpool) lots where the old rest areas
used to
be. These will be accessed via the frontage roads. (These were not included in
earlier plans.)
Schwab Rd. interchange
2 |
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Schwab
Road to Business Loop 35 (North) |
Status: Unfunded;
no estimated start date (likely to be broken into smaller projects)
Description:
This project will do the
following:
- Schwab Rd.
intersection and vicinity
- 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.
- 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.
- Engel Rd.
intersection and vicinity
- 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.
- 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.
Status: Under
construction
(started in January 2022 and is 44% complete with estimated
completion in late 2023)
Description:
This
project will make the following intersection improvements:
- Add
a raised median on FM 725 between I-35 and Bobolink Dr. and on Seguin
Ave. between I-35 and BL 35
- Convert
Merriweather St. to a right-in/right-out intersection at Seguin Ave.
- Add
a double right-turn lane from the northbound I-35 access road to
southbound FM 725
- Add
an additional through lane on northbound FM 725 under I-35 for a total
of four lanes-- two dedicated left-turn lanes and two through lanes
- Add
an additional through lane on the southbound I-35 access
road
- Add
a dedicated right-turn lane on northbound FM 725/Seguin Ave. at I-35
and at BL
35
- Add
a dedicated right-turn lane on southbound Seguin Ave. at
I-35
- Lengthen
both the northbound and southbound turnaround approach lanes
FM 725 intersection
4 |
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Business
Loop 35 (North) to FM 306
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Status: Under
construction
(started in September 2019 and is substantially complete)
Description:
This
project has done the following:
- FM 306 intersection
and vicinity
- Reconfigured
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 partial DLT at Aquarena Springs Dr. and I-35 in San
Marcos.
- Extended
the dedicated right turn lane on westbound FM 306.
- Improved
the right turns on the northbound access road into New Braunfels Town
Center, and installed a concrete island to prevent traffic coming from
the
turnaround from turning into the first two driveways.
- Removed
the southbound
exit ramp to BL 35 at Nissan Way and converted it to an
entrance
ramp, and removed the southbound entrance ramp just north of FM 306.
Southbound traffic from FM 306 now enters I-35 at the new entrance ramp
at Nissan Way, and southbound I-35 traffic exiting to BL 35 now uses
the Post Rd. exit, which has been slightly
relocated and lengthened.
- Removed
the
northbound entrance ramp immediately north of BL 35 and replaced it
with
an exit ramp, and removed the northbound exit ramp to FM 306.
Northbound
I-35 traffic exiting to FM 306 now uses the new exit ramp near BL 35,
and northbound traffic from BL 35 now enters I-35 at the existing
entrance ramp just
just south of FM 306, which has been slightly
relocated and lengthened.
FM 306 partial
Displaced Left
Turn (DLT) intersection
5 |
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FM
306 to Watson Lane area
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Status: Under construction
(started in March 2020 and is substantially complete)
Description:
This
project has done the following:
- Conrads
Lane/Kohlenberg Rd. intersection and vicinity
- Completely
rebuilt the Conrads Lane/Kohlenberg Rd. interchange as a more
conventional signalized intersection. The existing overpass
and loop
ramps were 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.)
- Widened
the access roads in both directions to three lanes between FM 306 and
Conrads Lane.
- Converted
the access roads north of Conrads/Kohlenberg to one-way and expanded to
three lanes (nominally.)
- Removed
the existing northbound entrance ramp from and southbound exit ramp to
Conrads/Kohlenberg and replaced with a new northbound exit ramp
and
southbound entrance ramp just north of there.
- Constructed
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
access roads to one-way from Conrads/Kohlenberg to FM 1102/York Creek
Rd. The
access roads north of FM 1102 have been
converted to one-way in conjunction with a separate project north of
the Hays County Line that is also revamping the Posey Road interchange.
Once these projects
are completed, all of the I-35 access roads from San Antonio to Austin
will be one-way.
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Watson
Lane to Hays county line
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Status: Unfunded;
no estimated start date
Description:
This
project will do the following:
- Watson Lane area
- 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.
- FM 1102/York Creek
Rd. intersection
- Completely
rebuild the FM 1102/York Creek Road interchange as a more
conventional 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.
FM 1102/York Creek Rd.
intersection
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.
Note that this is the full corridor schematic and includes all the
changes above. Also 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.
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
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