San Marcos Mercury | Local News from San Marcos and Hays County, Texas

The addition of a second lane from westbound Texas 80 to southbound Interstate 35 will “further ease traffic congestion and flow through the interchange,” the agency says. 


This just in from Texas Department of Transportation spokesperson Mark Cross:

Construction crews will begin this week setting up barriers at the intersection of Interstate 35 and State Highway 80/Hopkins Street in San Marcos for construction improvements that will further ease traffic congestion and flow through the interchange.

TxDOT and its contractors will begin work that will expand the west bound SH 80 to southbound I-35 exchange from one lane to two lanes.

The interchange currently operates as “Continuous Flow Intersection.” A CFI is an innovative design that allows vehicles to travel more efficiently through an intersection. It enhances safety and increases traffic flow through intersections by allowing left-turning traffic and thru-traffic to move simultaneously.

Traditional intersections have left-turning traffic placed in the middle of the road, so thru-traffic must wait for those vehicles to turn. A CFI shifts left-turning traffic to the outer edges of the road, which allows thru-traffic to move through the middle of an intersection and keeps left-turning traffic moving simultaneously along the outer edges of the intersection.

The work slated to begin this week will continue through August, weather permitting.

Motorists may experience minimal disruption to traffic flow.

Please keep the following tips in mind when driving through work zones:

  • Slow down and always follow posted work zone speed limits. Speeding is one of the major causes of work zone crashes. Remember, traffic fines double in work zones.
  • Pay attention. Workers and heavy equipment may only be a few feet from passing vehicles.
  • Be patient. Delays from highway construction can be frustrating, but it only takes a few extra minutes to slow down for a work zone.
  • Plan ahead. Leave a few minutes early when traveling through a work zone in order to reach your destination on time.
  • Fines for moving violations in work zones can be as high as $400 if workers are present.
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7 thoughts on “TxDOT to modify recently completed I-35, Hopkins Street interchange

  1. Not to be mean or anything but shouldn’t this have been a no-brainer? If you they had the room they should have made 2 lanes in the first place. While they’re fixing the intersection maybe they can re-locate some signals so they can be seen from where you need to see them… the southbound to northbound U-turn signal, for example.

  2. Great. If we could get it working as well as it did before the changes to “continuous flow” that would be some real progress.

  3. Hwy 80 from the blanco river bridge should have better signage telling the drivers what kind of messed up traffic jam they’re in for in front of Hastings. What a flipping mess. The fellow who designed this should have to commute thru there daily! All that was needed was a second turn lane under 35 going south bound. How hard is that? Wouldn’t have cost near as much as what they came up with. Could you please put it back like it was just add 2nd turn lane like at Wonder World and 35?

  4. Oh yes, *please* fix the lights! There are problems with orientation and visibility of the lights at both the Hopkins and Acquarena intersections . I called several times this past winter about them. but kept getting bounced between the city and the state, with no one seeming to want responsibility. It’s a dangerous situation that could easily be fixed.

  5. Traffic flow? There is not any traffic flow at all… If you want to do a basic travel flow from the north to south bound or vice versa there is a stop light now. Just backs up everybody. Not to mention the lights change at a drop of a dime from yellow to red and red to green… Half the cars out there are running red lights because of this messed up light system. There is more traffic now then ever before with this god forsaken switch you did…

  6. I agree – the Hopkins/35 interchange is worse than it ever was. The Aquarena/35 intersection was bad enough. It is almost okay in comparison to the mess at Hopkins/35. Please please please put it all back to normal. Just plain dangerous the way it is.

  7. I drive the Aquarena/N I-35 intersection every day, and I’m quite pleased with how well it works (I purposely take the left turn/continuous flow intersection instead of going straight, even though I end up in the same place: Aquarena & River Rd/Uhland Rd). I never did understand why they only put in one lane at the Hwy 80/S I-35 intersection, as there is so much more traffic there. Hopefully they can get this finished on the expected timeline, which should be before students return for the fall semester. But I’ll continue to avoid the intersection until it’s finished.

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