Are We Building the Right Things or Just Building More?

A transportation project has one obvious moment when everyone calls it a success: opening day. The ribbon is cut, the lanes are open and after years of planning, funding, and construction, the project is finally done. But finishing a project and solving a problem are not always the same thing. The way we define the success of a project shapes what we choose to build next. If success means getting a project across the finish line, then the job is simple: finish one, start the next. But transportation projects affect communities long after the ribbon is cut, so finishing the project can’t be the end of the conversation.  If we assess success through other measures like better access, safer streets, and stronger communities, the questions look much different. 

Did this investment solve the problem it was meant to solve? Can the community afford what it built? And will it still be serving people decades from now? 

By 1992, the original Interstate construction program was essentially finished. But that didn’t mean the federal government stopped spending on highways. The focus shifted to maintaining, rebuilding, and expanding the network we already had. We were no longer building the Interstate to complete a defined national mission. Highway construction continued, but without the same clear finish line. Somewhere along the way, expansion became an answer in itself. We stopped asking what problem we were trying to solve and started asking what we could build next. 

We explored some of this history in Mission Accomplished, our look at what happened after the Interstate completed its original mission and how the federal highway program continued long after the original network was in place. The paper follows what happened next: the system kept growing, even as the cost of maintaining the roads we had already built kept growing with it. What began as a project with a clear purpose and an end point became something much harder to step away from, with new highway projects continuing even as the needs and costs of the existing system changed.

(And if you want to see that story play out rather than just read about it, our accompanying YouTube video is worth watching. It puts the scale of the Interstate project and the changes that followed into perspective, which helps explain why the decisions we make about these roads still matter today.)

We are still living with that system, maintaining it, widening it, and adding to it. The focus now is whether those decisions are actually making the places they pass through safer, more accessible, and better able to support the people who live there.

We’re pretty good at explaining why a highway is crowded. There are too many cars, not enough space, and everyone is trying to get somewhere at the same time. So the answer can seem pretty obvious: make more room. But a crowded highway is often the last link in a much longer chain of decisions. 

As jobs and housing have spread outward, many people have found themselves living farther from where they work.  A person can live in one community, work in another and need a highway to connect the two every day. A family may move farther from a job because housing closer to it is too expensive. A trip that once could have been made locally becomes a 30, 40, or 60-minute drive. Then the highway fills up, and we call it a congestion problem. 

A highway doesn't exist in isolation. The roads we build help shape the places around them. When a highway makes it easier to travel long distances, development can spread farther from existing jobs and services, and people can end up traveling farther for the things they need. Over time, that can create a familiar cycle. More development creates more trips. More trips create more congestion. Congestion creates pressure for more highway capacity. Then that new capacity can make it easier for development and daily trips to spread farther out. 

Widening the road can change how much traffic it can carry, but it doesn't change the distance between where people live and where they need to go.  It doesn't change the location of jobs. It doesn't make housing closer to employment. It doesn't make the places people need to reach any more accessible without a car.

And when new capacity makes a long commute feel more manageable, people can adjust around it. They may drive more often, travel at times they previously avoided or choose housing farther from work. 

The Federal Highway Administration accounts for this induced traffic in its own transportation analysis, recognizing that added highway capacity can lead to changes in routes, schedules, frequency, and destinations.

That's why a highway can get wider without the underlying problem getting smaller. This is where the question of success matters. If we define success as moving more cars through a corridor, then a wider highway can look like an obvious win. If the goal is to make it easier for people to reach the places they need to go, the picture gets more complicated.

The commute between Bethesda, Maryland, and Tysons Corner, Virginia, is a good example. The two communities are major job centers in the Washington, D.C., region, connected by the Capital Beltway, the highway loop that circles the nation's capital and carries traffic between Maryland and Virginia. 

Virginia's 495 Express Lanes were built to add capacity through one of the region's most congested corridors. The Northern Extension opened at the end of 2025, carrying the express lanes farther north toward the American Legion Bridge, which connects Virginia and Maryland. The goal was to ease congestion and give drivers another option when the regular lanes slow down.

The lanes are there. The investment was made; what actually changed? A person traveling from Bethesda to Tysons isn't using the highway in pieces. They're trying to get somewhere. If traffic moves more smoothly through one part of the corridor but backs up again at the bridge into Maryland, the new lanes haven't eliminated the problem. They've changed one part of the trip. That's an important distinction when we talk about highway expansion. A project can improve the piece of highway we built without improving the trip we were trying to make better. 

So when we ask whether an expansion worked, the answer has to come from the trip, not the lane. Did congestion improve across the whole corridor, or just one stretch of it? Are the places it connects any easier to reach? Did it get safer? Will the benefit still be worth what it costs to maintain the added infrastructure years from now?

If we keep widening roads to accommodate the way our communities have developed, we can end up reinforcing the same pattern that created the demand in the first place: housing farther from jobs, jobs farther from neighborhoods and more daily trips that require a car. At some point, the question isn't whether we can fit more cars onto the highway. It's whether we want to keep building communities that leave so many people needing one.

That brings us back to what we should expect from a transportation investment. The point of a highway isn't really to move cars. It's to help people get somewhere. Those aren't always the same thing. 

If people are traveling long distances because jobs and housing are far apart, a wider road doesn't close that distance. If people are driving because there's no other practical way to get to work, more capacity doesn't give them another option. If a road or bridge we already have is falling apart, keeping it in good shape may do more for a community than anything new. The point isn't that every highway project should be replaced with a train or a bus. It's that we should be willing to consider what would actually solve the problem before deciding that more highway is the answer.

The Interstate gave us a way to move people and goods across the country. We accomplished that mission. The one we haven’t yet answered is: what are we trying to accomplish now, and would we know if we got there? 

That's the thread Mission Accomplished pulls on. Not just what we build, but how we decide it worked. Before we spend the money, we should know what we're trying to change. After we spend it, we should be willing to find out whether anything actually did.

A highway project has a finish line. The people using it don't. The ribbon cutting tells us construction is over. It doesn't tell us whether we succeeded.