Adding a “highway cap” to make highway expansion more palatable

Several recent urban highway expansion projects include a new twist: putting some green space around and over the new highway.

Wheeler didn’t hesitate to acknowledge that adding lanes never helps congestion, thanks to the principle of induced demand. Instead, what he emphasized about the project is its progressive window-dressing: its cap. A few blocks of the highway would be lowered below grade and planted with a bit of Chia fuzz, with a new bike-ped crossing on one of the sides. This is the grid “restoration” of which the mayor speaks—essentially, a minor diminishment of a roaring, stinking concrete channel that will roar and stink all the more with this added capacity.

Highway caps are an ever-more common feature of 21st century urban highway projects, and this project sounds a lot like some others we’ve heard of recently—namely, the Colorado DOT project that promises to triple I-70’s footprint through two of Denver’s last working-class neighborhoods and cover a small section with a park. The project has been mired in controversy for years, with lawsuits and pleas to the governor to halt it on environmental and social justice grounds.

Ironically, the 800 square-foot “cap park” proposed for the Denver boondoggle stemmed from early community advocates who pushed back against CDOT’s original plans to simply widen the existing elevated structure. The introduction of the cap a few years ago was heralded as a victory by some residents of the neighborhoods, which have been passed over for local investments for years. But the I-70 project, with its attractive grassy mask, has since been corralled into a suite of plans to redevelop huge swaths of the affected neighborhoods.

Now, the fear of displacement, underscored by the property-value increases that highway cap parks can bring, has driven many longtime Denverites to bitterly oppose the construction. “I just hope my kids will get to play there,” said one local mom who regretted ever advocating for the project, which a Denver public policy expert compared to “old-fashioned 1950s slum-clearance.”

Parks can only do so much to cover up that highways take up a lot of space, bring noise and traffic, and can either help contribute to disinvestment or gentrification.

This sounds like greenwashing. It can take many forms in trying to beautify or distract from uglier elements of the built environment. Does a few bushes in planters in the parking lot really transform the setting and allow a visitor to escape into nature? This is the subject of part of James Kunstler’s TED talk “The Tragedy of the Suburbs” – with roughly 8:00 minutes remaining – where he dissects such parking lot plantings. Even expanding the size of the nature area, such as park in these examples, may not be enough if the surrounding land use is even more sizable.

The price to get your business on those blue highway amenities signs

It is a surprisingly complicated – and possibly costly – process to promote your business on a blue sign along the highway:

Roadside advertising programs are administered by individual states, though specific service signs like the one in the picture above tend to be farmed out to contractors. One of the biggest of these contractors is a company called Interstate Logos, which works with transportation agencies in 23 states to not only install the huge blue panels, but also to work with businesses to run the programs…

But even if your business meets all the requirements, and you’ve submitted your online application, there may be competition from other nearby businesses. As for which of those businesses get to be on the signs, that depends on the state’s policy. Colorado rotates the businesses at the end of each contract year, but other states like Michigan give preference to businesses nearer the highway, while still others like Washington use a first come-first serve (with waiting list) approach…

Typical mainline logo signs are about 48 inches by 36 inches, so based on WSDOT’s ballpark figures, it’s probably safe to figure about $300 to $500 per sign (this agrees with the Lexington Herald Leader’s claim of $1,253 for four logos)…

The sites says that in 2010, Kentucky Logos—contracted by the Kentucky DOT—paid the state $618,904.91. That’s great for the state, but according to the report, of the businesses on the 1,568 signs in the state, only 1 to 2 percent leave annually. So it seems the businesses are happy, too.

America: combining public services (highways) with business opportunities (advertising a select number of places for travelers to spend their money).

More thoughts on these signs:

  1. Why not include signs for big box stores? Places like Walmart or Target or Costco could provide most or all of these amenities in one stop.
  2. I don’t think the signs are as effective in denser areas where there a lot more options as you approach the exit. They can highlight a few options but you can already see a lot more signs in the distance.
  3. The lodging and camping signs seem outdated. How many people now drive down the highway and pick out a hotel at the side of the road? That sign space could be better used for other amenities.
  4. How effective are these advertisements compared to other forms? Does McDonald’s get a bigger return on the blue sign or a forty foot tall arch or a combination of both?

Second Chicago area diamond interchange opens; how many will follow?

Diverging diamond intersection number two in the Chicago region is opening over the course of a week at I-90 and Elmhurst Road:

Essentially, “northbound and southbound vehicles take turns crossing the intersection,” Garrett explained. “They’ll cross over to the other side, which makes all ramp movements unrestricted. There’s no opposing traffic when turning onto I-90 ramps, which means unopposed left turns and unopposed right turns.”…

On Monday, it will switch to two lanes, and two rebuilt I-90 ramps carrying vehicles to and from the east will reopen. Those ramps will handle about 21,000 vehicles daily.

On Tuesday, two new ramps taking traffic to and from the west will debut, accommodating an estimated 12,000 vehicles a day…

Underneath the diverging diamond is a tangle of utility pipes that carry liquids ranging from jet fuel to O’Hare International Airport to drinking water for suburban communities.

The article notes that only a few motorists had trouble on the opening day.

Looking forward: how many of these can we expect to see in coming years or are these a highway interchange fad? The first diamond interchange in Naperville has had some success – see this earlier post. But, drivers tend to be fussy about changing the roadways, whether with a new interchange or through introducing roundabouts. And, I imagine few residents would be happy to rip out old intersections just to put in a new pattern (think of the costs as well as the lost time to increased congestion). Perhaps we might see a few more of these over the next ten years or so but I don’t think they will become the new normal (which also might decrease people’s comfort with them if they encounter them infrequently).

“Politics of pavement” amidst the start of construction season

Commuters and taxpayers may be unhappy with annoying roadwork but as this summary of upcoming projects in the Chicago region reminds us, roadwork is political:

With no state budget in sight as Republican Gov. Bruce Rauner feuds with Democrats, the idea of a capital plan to fix infrastructure seems as likely as unicorns in hard hats.

That disconnect is not only strangling transportation funding in Illinois, it’s also thwarting a pet project of Rauner’s — adding tolled express lanes to I-55 in Cook and DuPage counties…

For the Illinois tollway, money’s not a problem. But the agency is locked in a dispute with the Canadian Pacific Railroad over land it wants for I-490, a ring road around the west side of O’Hare International Airport.

If Canadian Pacific wins support from federal regulators in a pending case, it’s a potential catastrophe for the tollway.

Roads are power? Any major infrastructure project involves lots of money, voters, and jobs. Additionally, in a country where driving is so important, construction on major roads is a big deal.

So, is anyone winning the political battle through roads in the Chicago region? Big city mayors like to claim that they are different than national politicians because the mayors have to get things done. The same may be true for governors on infrastructure issues. Presumably, limiting the political battles over roads helps everyone win as costs are reduced (prices for big projects only go up over time) and residents can start experiencing the benefits sooner.

Nature, driving, and states closing “old-fashioned” rest stops

When money is tight at the state level, one way to save money is to close highway rest areas:

Cash-strapped transportation agencies are shuttering the old ones to save money, or because they don’t attract enough traffic or are in such bad shape that renovating them is too costly. Or, the stops have been overtaken by tourist information centers, service plazas that take in revenue from gasoline and food sales, or commercial strips off interstate exits.

Florida, Michigan, Ohio and South Dakota are among the states that have closed traditional rest stops in the past two years. And a battle is brewing in Connecticut over a proposal to shut down all seven stops on its interstate highways to save money.

But advocates of maintaining traditional rest areas say even if motorists are offered flashier options for pit stops, the ones that sprung up as highways did are still needed for driver safety and convenience. Some view them as a tranquil, environmentally friendly alternative to crowded service plazas and commercial strips…

But unlike service plazas, rest areas on federal interstate highways are prohibited from selling gasoline or food other than from vending machines, the proceeds of which traditionally go to people who are visually impaired. State transportation departments run the rest areas and are responsible for cleaning and maintaining them. That can take a chunk of their budget, depending on staffing and amenities, officials say.

It almost seems quaint that highway driving should be broken up to stops at state rest areas where drivers can experience nature and rest. Can highways and nature go together, especially on a small patch of green land within earshot of the interstate? Highways can of course be used for pleasurable trips but the majority of highway traffic is likely for practical purposes such as going to work or conducting some kind of personal business. In contrast, given our reliance on the trucking industry, the issue of spaces for truck drivers to stop seems like a bigger deal.

Ultimately, this seems to be about whether Americans deserve to have some spaces in life where commercial interests are severely limited or not allowed. Given the encroachment of economic life into many life domains, this change isn’t too surprising.

Atlanta bridge collapses, traffic isn’t that bad

Urban highways are often very busy but when they are completely out of commission, it doesn’t necessarily lead to horrific traffic:

You’ll forgive our excessively clinical attitude about this damage—and it’s going to cost tens of millions to fix—but what we have here is a classic “natural experiment” of the kind economists and students of public policy relish. So what happens when we take a major urban freeway out of service for a couple of months? Are Atlanta commuters in for hours of gridlock every day and grisly commutes? Will the region’s economy grind to a halt as a result? We’ll be watching over the next several months to see.

So far, the results are consistent with what we’ve seen in Los Angeles and Minneapolis. Monday morning came, and something funny happened: traffic wasn’t so bad

So what’s going on here? Arguably, our mental model of traffic is just wrong. We tend to think of traffic volumes, and trip-making generally as inexorable forces of nature. The diurnal flow of 250,000 vehicles a day on an urban freeway like I-85 is just as regular and predictable as the tides. What this misses is that there’s a deep behavioral basis to travel. Human beings will shift their behavior in response to changing circumstances. If road capacity is impaired, many people can decide not to travel, change when they travel, change where they travel, or even change their mode of travel. The fact that Carmageddon almost never comes is powerful evidence of induced demand: people travel on roadways because the capacity is available for their trips, and when the capacity goes away, so does much of the trip making.

If Atlanta can survive for a month or two without a major chunk of its freeway, that’s a powerful indication that more modest steps to alter road capacity don’t really mean the end of the world. If we recognize that traffic will tend to adjust to available capacity, we then end up taking a different view of how to balance transportation against other objectives. For example, this ought to be a signal that road diets, which have been shown to greatly improve safety and encourage walking and cycling, don’t have anything approaching the kinds of adverse effects on travel that highway engineers usually predict.

I do think that this suggests drivers will adjust their behaviors based on what roads are available. At the same time, there is probably a tipping point where reducing too much traffic capacity would make a big difference. This might be especially true in car-driven places like Atlanta and Los Angeles that are known for sprawl. Presumably, places where traffic capacity could be picked up by other transportation options (such as closing the Embarcadero Freeway in San Francisco where driving is already a hassle and other options include BART, Muni, etc.) would fare better. Or, perhaps road capacity has to be reduced gradually so that people have time to adjust and make new choices about travel and where they live and work.

See earlier posts about what happened with Carmageddon I and Carmageddon II in Los Angeles

A map that would reveal what was there before the highway was built

This article discusses a cool tool that removes highways on the map so you can see what else is using that space:

In true public-spirited manner, the map is built from an OpenStreetMap, with tags identifying highways, off-ramps, and exits to make the roads vanish or reappear. However, Sisson didn’t set out on a nihilistic quest to annihilate all highways—he just wanted to look underneath them.

I wish this went one step further: when the highway is removed from the map, could we see what was there before? Urban highways have famously altered numerous neighborhoods – whether the highway that was later replaced by the Big Dig in Boston or the fight between Jane Jacobs and activists in Manhattan and Robert Moses to avoid a new highway or the Dan Ryan in Chicago separating black and white neighborhoods – yet those neighborhoods mostly disappear. The highway seems permanent even though most have only been around for 50-70 years. Of course, it would be really difficult to project what those spaces might look like today if the highway had not been constructed but it would still be nice to be able to peel back the layers. Actually, this wouldn’t be a bad idea for many city locations: what if Google Maps had a timeline component where you could set it to 1950 and see what there then (particularly if images could be incorporated) or even earlier?