Opening of MoPac express lanes prompts review of how toll rates are determined

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HOW IT WORKS
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ACCESSING THE EXPRESS LANE
When toll rates exceeded $8 for a brief period in the first week the full northbound MoPac express lane was open, the toll agency operating the lane decided to review how those rates are set to avoid rate spikes.

Mike Heiligenstein, executive director of the Central Texas Regional Mobility Authority, said he thought toll rates would taper off after $5 and discourage drivers from entering the express lane.

“It’s clear that there’s enough demand that we’re revising our approach and trying to understand more about that demand and how prevalent that is,” he said.

The Mobility Authority is overseeing the MoPac Improvement Project that added one express toll lane in each direction on MoPac between Parmer Lane and Cesar Chavez Street. The entire northbound lane opened Oct. 7, and the southbound lane was slated to open either Oct. 28 or Nov. 4. The date was set after Community Impact Newspaper’s Oct. 24 press date.

The toll rate is set using an algorithm as well as traffic speeds and volumes gathered by cameras and sensors. However, in the first few weeks of operating the new lanes, staffers are also monitoring the rate and making adjustments as needed to keep the express lanes flowing at 45 mph.

Heiligenstein said increased demand, especially from vehicles entering the northbound express lane from south of Lady Bird Lake and from Cesar Chavez, is causing some issues with the toll rate spiking.

“We would rather see a gradual increase in price,” he said. “One day we shot up to $7.80 because we saw what was happening on the traffic coming from across the river and getting into that curve around The Domain.”

That curve near Duval Road has caused noticeable backups in the northbound express lane.

“I think it’s going to take a month for this to settle out in terms of usage and user behavior,” Heiligenstein said.

More than 85,600 transactions were recorded in the first week, exceeding Mobility Authority expectations.

Traffic was smooth on the first weekday rush hour Oct. 9 in the new northbound toll lane, but that Monday was a national holiday.

“We expected a slow start and people to try it out of curiosity,” said Tracie Brown, the agency’s director of operations. “It has exceeded our expectations.”

But the following weekdays brought reports of congestion in the express lane and high toll rates. On Oct. 10 resident Michael Holland called MoPac a “massive failure” around 5:15 p.m.

“As far as I can tell the toll lane is fine,” he said. “It’s the same design that I’ve used in Dallas, Houston and Los Angeles, where people know how to merge and don’t do sudden stops for no reason. However, people were finding a reason to come to a repeated dead stop in the toll lane.”

Before the full northbound lane opened, a typical afternoon rush hour from 4-7 p.m. calculated 1,200 transactions in the northern section north of RM 2222 that opened in October 2016. Oct. 10 recorded 3,877 transactions in that section from 4-7 p.m., with an average toll rate of $0.77 compared to $0.57 in the southern section south of RM 2222. Oct. 12 saw the highest toll rates, with averages of $3.29 from 4-7 p.m. in the northern section, peaking at $6.28, and $1.53 in the southern section, peaking at $2.25.
By Amy Denney

Managing Editor, Austin metro

Amy has worked for Community Impact Newspaper since September 2010, serving as reporter and later senior editor for the Northwest Austin edition as well as covering transportation in the Austin metro. She is now managing editor for the 10 publications in the Central Texas area from Georgetown to New Braunfels.



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