Tennessee DOT Moves Past Road-Widening as a Congestion Reduction Strategy

In the late eighties and nineties, every traffic issue the Tennessee Department of Transportation faced was assigned the same solution: a bypass. But over the years, the department has come around to a new way of doing things, according to 40-year TDOT veteran Ralph Comer. Comer says the current commissioner, John Schroer, wants to become known as the “no-bypass commissioner.” He simply believes there are usually more cost-effective ways of solving transportation problems.

"Context sensitive solutions" preserve main streets like this one in Franklin, Tennessee instead of turning them into high-speed thoroughfares. Photo: ##http://blog.westhaventn.com/bid/124337/Why-Franklin-is-the-Perfect-Place-for-Your-New-Franklin-TN-Home##Westhaven##

This way of thinking led Schroer, Comer, and the department into a conversation with Smart Growth America. They teamed up to examine the state of Tennessee’s transportation system and devise a path forward, bringing together an impressively diverse coalition, from the Tennessee Disability Coalition to the Sierra Club, the public transit association to the road builders association. One irrefutable fact brought them together: The TDOT project pipeline would cost nine times more to construct than available funding would permit. Something had to change.

Tennessee is in better fiscal shape than most states and is one of a small handful of states with zero debt – meaning it pays zero percent of its budget toward debt service, leaving a lot more for infrastructure. That’s a luxurious position in today’s economic context. So if a close examination of cost-effective transportation strategies can be transformative for Tennessee, just imagine what it can do for states even more desperate to get costs under control.

The report that came out of the TDOT/SGA sessions [PDF] isn’t a project-by-project prescription, and it isn’t binding. But it looks at “context-sensitive solutions,” rather than building the same road through vastly different landscapes.

“A U.S. highway through a rolling hillside is different from a U.S. highway in a suburban community is different from a U.S. highway through a small town where that highway is also main street,” said Roger Millar, who directs Smart Growth America’s Leadership Institute. The report adds that appropriately designed streets will encourage appropriate vehicular speeds, and Millar notes they can also revitalize downtown.

“We can’t afford single solution investments anymore,” Millar said. The transportation system needs to move people, goods, and services at the same time it supports the main street economy. The best part is that the “context-sensitive solutions” TDOT is looking at often mean canceling big-ticket road-widening projects in favor of greener approaches at a fraction of the price.

The report lays this bare:

TDOT cannot always solve congestion by building more, wider and faster state roadways. There will never be enough financial resources to supply the endless demand for capacity. In fact, TDOT currently has nine times more projects in its project list than available funding will cover.

Further, TDOT realizes that the “wider and faster” approach to road construction cannot ultimately solve the problem. Sprawling land uses are creating congestion faster than roadway capacity can be increased. The illustration [below] depicts this never-ending cycle of transportation and land use changes. TDOT intends to work to manage capacity by better integrating land use and transportation planning. The desire to go “through” a place must be balanced with the desire to go “to” a place. Roadways have many purposes, including providing local and regional mobility, offering access to homes and businesses, and supporting economic growth.

Source: ##http://www.smartgrowthamerica.org/documents/removing-barriers-in-tennessee.pdf##Removing Barriers to Smarter Transportation Investments##

Of course, TDOT isn’t a land use agency. So they’re partnering with local governments to collaborate on transportation and land use decisions. And, according to Millar, the commissioner is prepared to say, “If you guys are going to sprawl, we can’t support you. We can’t afford that. You guys are going to sprawl on your own. Or maybe we can do things a different way.”

What the agency can do on its own is “right-size” the projects on its list. “There may be a $40 million or $50 million [bypass] project that achieves a transportation objective,” said Millar. “And you can achieve 95 percent of that objective for 10 percent of the cost.” Maybe the solution is to remove curb cuts or optimize the traffic light timing on an existing congested roadway, allowing traffic to move more freely. Operational improvements like that can reduce congestion for a fraction of the price of adding a new bypass.

“What’s the appropriate solution?” Millar went on. “Do you spend the $50 million that you don’t have? Or do you spend $5 million and get 95 percent of the way there?” Looking at the problem that way generated a lot of consensus among the coalition.

Without a set of binding recommendations on individual projects, the report provides the next best thing: a set of performance metrics by which TDOT can evaluate projects. “It was suggested in the first meeting that important goals or metrics might include economic impacts, job generation, cost saving potential, applicability to capital improvements/maintenance/operations, sustainability, equity, and ease of implementation,” the report says.

By those criteria, many projects that have long been in the pipeline are now being reevaluated. For example, the planned county seat connector program would have linked all of the state’s 95 county seats to the nearest highway. But according to Comer, who serves as TDOT’s assistant chief of environment and planning, “County seats were established back in the 1800s to be the geographic center of the county, not necessarily the population centers.” So now the trick is to see what projects still make sense.

Comer remembers the investment studies the Federal Highway Administration used to do in the eighties. They called all affected parties together for ideas, as agencies still seek to do. “But what often happened,” said Comer, “is that if a state DOT was proposing an interstate widening project or a new interchange project, you would call the transit agency to come to the table, and you would ask, ‘What long range plans do you have for accommodating transit?’ And because they didn’t have any money, they would say, ‘Well, we really don’t have any plan.’ So the foregone conclusion was ‘Well, then you’re going to do the highway project.’ We’re trying to get away from that now.”

  • Westhaven1

    A couple of issues with the diagram above. First, the new development bings in new taxes. And, at least where I live in TN ( just outside Nashville), new homes are generally more costly than the median home price and are built ever closer together on ever-smaller lots. So each lot generates more taxes on average eben as each lot requires less infrastructure than in older neighborhoods. Developers build the local streets and sidewalks, so why doesn’t the newly-expanded tax base, having no immediate infrastructure needs, generate enough taxes to pay for state road expansion done on its behalf? Probably, new taxes go to fixing decrepid infrastructire in old neighborhoods instead of keeping up with the needs of the new neighborhoods.

    Second, there are major roads within Nashville that should have been widened as much as two generations ago. Drivers learn to take back roads to bypass crowded arteries. When the arteries are widened, the latent traffic goes back to the arteries, and planners seem to think the widening roads CREATE drivers when in fact they simply go to long ignoring the problem, letting motorists, and future developments, work it all out. Build the road FIRST, then that will increase property values along the road and entice development where you want it.

  • LYP

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