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Smarter streets

They’re coming soon to Houston.

Houston City Council on Wednesday will consider a $33.6 million contract – partially funded by a $10 million federal grant – to add hundreds of traffic-tracking devices across the city so officials can receive better up-to-date information, respond by adjusting traffic signals and provide current conditions to drivers more quickly.

Freeways in most major cities have traffic detection, cameras and changeable message signs to warn drivers of tie-ups around the area. Some cities also have used the systems along specific corridors.

Houston is taking that approach citywide, optimistic an integrated system can improve traffic, and show drivers their best route choices via signs and traffic maps.

“The ability to visually verify incidents and alert drivers to travel times on parallel alternate arterial and freeway routes will be a benefit,” said Tony Voigt, a Texas A&M Transportation Institute researcher based in Houston. “The ability to better detect vehicles at signals and use that data for signal timing updates at more frequent intervals – and in real-time, if necessary – will be a benefit.”

Proving that, however, can happen only after the devices are in place.

“We have ‘before’ data and we will get ‘after’ data,” said Jeff Weatherford, deputy director of Houston Public Works in charge of traffic operations and maintenance. “No one has really done this on this large of scale. That is part of why the federal government gave us this money.”

Voigt, whose office assisted with some of the research for the grant proposal, agreed.

“Will the benefit be as large as compared to freeway (traffic systems)?,” Voigt said. “I would say maybe not, but the benefits should still be considerable.”

Based on federal data, he noted about half the miles traveled in urban areas happen on local roads – not freeways or major highways – so anything aimed at more accurate data for those roads naturally will benefit drivers.

All of the new technology will be integrated into existing traffic operations controlled by Houston TranStar, which combines resources from the city, Harris County, the Texas Department of Transportation and the Metropolitan Transit Authority.

This is all good, and I’m sure it will help. Having more and better realtime data about traffic incidents and tie-ups will improve life for lots of people. It’s just that data can only do so much – it can’t improve capacity, it can just move it around. As long as we’re clear on that and realistic about what this can achieve, it’s fine.

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