AARoads Forum

Regional Boards => Mid-South => Topic started by: kernals12 on May 11, 2022, 06:38:17 PM

Title: I-35 Expansion in San Antonio
Post by: kernals12 on May 11, 2022, 06:38:17 PM
With much less controversy than in Austin, TxDOT is undertaking a massive expansion of I-35 in San Antonio. They're double decking 10 miles of it northeast of I-410 with 3 non-tolled express lanes in each direction. The groundbreaking ceremony was held today (https://www.tpr.org/texas/2022-05-11/ground-broken-on-i-35-double-decker-project) and construction on the $1.5 billion project will last until 2027.

(https://i.imgur.com/PUkM3V1.jpg)

Combined with the widening of Loop 1604 from 4 lanes to 10, San Antonio is really going agro on its traffic problems.

It does beg the question though of why they can't do this for I-45 in Houston
Title: Re: I-35 Expansion in San Antonio
Post by: Plutonic Panda on May 12, 2022, 01:06:14 AM
Is this considered “double decking?” To me they’re just adding elevated express lanes. Double decking would technically be placing a deck over the existing highway.

Either way this is an excellent project. I wish they’d do this on US-101 from downtown LA to Topanga Canyon.
Title: Re: I-35 Expansion in San Antonio
Post by: sprjus4 on May 12, 2022, 07:23:35 AM
https://www.aaroads.com/forum/index.php?topic=24909.0
Title: Re: I-35 Expansion in San Antonio
Post by: longhorn on May 12, 2022, 09:41:43 AM
Title: Re: I-35 Expansion in San Antonio
Post by: kphoger on May 12, 2022, 02:30:59 PM
Is this considered “double decking?” To me they’re just adding elevated express lanes. Double decking would technically be placing a deck over the existing highway.

Either way this is an excellent project. I wish they’d do this on US-101 from downtown LA to Topanga Canyon.

Aren't the elevated structures going to be "a deck over the existing" frontage roads?
Title: Re: I-35 Expansion in San Antonio
Post by: jgb191 on May 15, 2022, 04:10:22 AM
Is this considered “double decking?” To me they’re just adding elevated express lanes. Double decking would technically be placing a deck over the existing highway.

Either way this is an excellent project. I wish they’d do this on US-101 from downtown LA to Topanga Canyon.

Yeah it's still considered a double-deck because the elevated lanes will still fly directly above the ground lanes.  The difference between this and the original double deck sections of I-10 between downtown and I-410 is that the upper level of the upcoming I-35 section is limited exclusively to express traffic (nonstop from downtown to the county line) and lower levels are for local traffic who intend to enter the freeway and exit after a short distance.  The original sections on I-10 had on and off ramps from both levels.  Also the original I-10 eastbound and westbound upper levels are closer apart (if you flew over it in a helicopter, you couldn't easily see the lower level); whereas on the new I-35 section there will be a considerably wider gap between the northbound and southbound upper levels that will expose the lower level even from a birds-eye view.