Antonio Area Freeway System
INFO: SH 151 at Loop 410
page last updated May 25, 2019
SH 151 at Loop 410
Phase 1 complete. Phase 2 planned as part of a larger project on Loop 410 currently projected to start in late 2019
Phase 1 of this $81.8 million project constructed the first two flyovers at the
interchange at Loop 410 and SH 151. Specifically, this phase built
the eastbound SH 151 to northbound Loop 410 and the southbound
Loop 410 to westbound SH 151 connectors. In
addition, Loop 410 was widened to eight lanes from Ingram to SH 151
and auxiliary lanes were added to both directions of 151
Loop 410 to Potranco (eastbound) and Hunt (westbound.) Several
ramps on Loop 410 and SH 151 were relocated to accommodate the new flyovers and to improve traffic flow. An access road
on southbound Loop 410 at Military was added as well as turnarounds on
at Ingram, Potranco, and Hunt.
project will help
This project provided new direct connections on the
turn movements in the 410/151 interchange. This has removed
traffic from the pre-existing intersections and access roads has
overall mobility and safety for the remaining turning movements and local traffic. The addition of an extra lane
Loop 410 eliminated the previous bottleneck in that area. Since
the existing exit for SH 151 on southbound Loop 410 had to be removed,
the access road flyover on southbound Loop 410 at Military now 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 was completed in
late 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 as part of a larger project on Loop 410. 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
A detailed schematic for Phase 2 will be added soon.