Antonio Area Freeway System
INFO: SH 151 at Loop 410
page last updated November 30, 2018
Loop 410 from Ingram Rd. to SH 151 and SH 151 from Loop 410
to Hunt Ln.
Phase 1 complete
This $81.8 million project is constructing the first phase of a
interchange at Loop 410 and SH 151. Specifically, this phase has
the eastbound SH 151 to northbound Loop 410 and the southbound
Loop 410 to westbound SH 151 connectors. In
addition, Loop 410 is being widened to eight lanes from Ingram to SH 151
and auxiliary lanes have been added to both directions of 151
Loop 410 to Potranco (eastbound) and Hunt (westbound.) Several
ramps on Loop 410 and SH 151 have been relocated to accommodate the new
connectors and to improve traffic flow. An access road
on southbound Loop 410 at Military has been added as will turnarounds on
at Ingram, Potranco, and Hunt.
project will help
This project is providing new direct connections on the
turn movements in the 410/151 interchange. This will remove
traffic from the existing intersections and access roads which will
overall mobility and safety for the remaining turning movements and local traffic. The addition of an extra lane
Loop 410 will help eliminate the bottleneck in that area. Since
the existing exit for SH 151 on southbound Loop 410 has been removed,
the access road flyover on southbound Loop 410 at Military allows
traffic headed to eastbound SH 151 as well as accessing the commercial
areas at SH 151 and Loop 410 to bypass the signalized intersection at
started in October 2015, and is expected to be complete in
late summer 2018. The first flyover (southbound 410 to westbound 151) opened on April 14th,
2018. The second flyover (eastbound 151 to northbound 410) opened on May 5th, 2018.
2 is anticipated to start in late 2019. It is planned for this phase to
include the northbound Loop 410 flyover to westbound SH 151 and the
eastbound SH 151 flyover to southbound Loop 410.
- Why did work stop for so long on the flyovers?
work had started, an
engineering error was discovered in the plans for the long steel beams
which delayed their fabrication. In the meantime,
in order to prevent the overall project from being delayed, the
contractor worked on other areas of the project out-of-sequence,
i.e. work that was scheduled to be done after the flyovers were
Therefore, while this issue did delay the opening of the flyovers, it
did not cause any delay in the overall completion date of the
- Why is the pavement in the completed sections so rough?
those sections are not yet finished. The final pavement on a project is
never put down until the very end. This is to prevent damage to the
pavement while construction is still underway (much like the reason
carpet or flooring is the last thing installed in a new house.) Also,
traffic driving on those sublayers helps to better compress and settle
it before the top layer is installed.
on the image below to see an annotated overview schematic of this
project. The base schematic is courtesy of TxDOT; the
annotations are my own.
schematic is somewhat large and may take a few seconds to open.)
(Ingram to SH 151) and SH 151 (Loop 410 to Hunt) (1.90 MB)
on image above to see larger schematic