A gravel walk, which has become the city’s preferred means of getting around in Washington, D.C., could be a good way to keep sidewalks from becoming overrun by gravel and other debris.
“It’s an old technique and it’s a good method of getting through,” said Eric Schumacher, a landscape architect who helped design the walkway on a hillside near the National Mall.
“I’m not sure how effective it is on concrete sidewalks, but on gravel, I think it works pretty well.”
The walkway, which would be built around a gravel parking lot, could be installed along sidewalks and along existing gravel access roads.
It’s a relatively inexpensive option, costing $100,000 to $150,000.
Schumachers proposal calls for the gravel walkways to be installed on either a side of a parking lot or a street-level curb.
The walkways would be placed along a single line of concrete, or “gridded,” so they would not block pedestrian and vehicular traffic.
The gravel would be mixed with other materials to form a “gridding” layer that would allow the walkways “to be used in places that are not well paved,” the design notes.
The pavement would then be cut to form sidewalks, and the sidewalks would be designed to have a smooth surface.
The design, which was posted online in September, calls for a gravel gravel walk trail that would be made of one-foot wide, two-foot-wide and two-inch thick gravel.
The trail would extend to the sidewalk, which could be raised or lowered, to create a smooth sidewalk.
The goal is to reduce the amount of traffic, but not completely eliminate it, Schumchers said.
The proposed walkway would also be constructed with a raised buffer between the sidewalk and the gravel.
But the gravel would not be used to build the buffer, because the city would pay to have the buffer removed.
Schumerbs project is a model of what a gravelwalk might look like on a sidewalk, said David Lutz, a design engineer at The Urban Land Institute, a think tank in Washington that studies transportation.
Lutz said the gravelwalk would be similar to the pedestrian walkways on public transit, like a bike path, but without the gravel in the sidewalks.
The sidewalk could be used as a place to park cars and pedestrians, or could be turned into a playground or playground facility, Lutz told The Washington Post.
The National Park Service has already designed and constructed gravel walk paths along national parks.
Schumpers plan is modeled after the pedestrianwalk on the National Park System’s West Lawn.
It is also similar to a pedestrianwalk at the National Zoo, which is being installed as part of a larger design effort.
“You’re going to need some kind of buffer between them and the sidewalk,” Lutz explained.
“And you want it to be high enough to prevent the gravel from just sliding down the sidewalk.
You want the sidewalks to be able to move.”
The National Parks Foundation is funding the project, with support from the National Science Foundation.
The NPS is building a permanent gravelwalk on one of its many trails near the Washington Monument, which will cost $40 million and take about five years.
The project, which also includes an 8-foot pedestrian walkway that runs along the National Corvette Museum parking lot and another pedestrianwalk, will be open for a summer season, but is expected to be complete in late 2019.
“This project is an excellent example of a successful pedestrianwalk in a city that is currently plagued by the effects of a high number of gravel walk routes,” David P. Gorton, president and CEO of the National Parks Service, said in a statement.
“The National Parks have made great strides in the development of a pedestrian and pedestrian-friendly design and a concrete walkway along the Washington, DC, National Mall.”
A recent report from the Institute for Transportation and Development Policy found that the number of pedestrians in D.A.C. had dropped to the lowest levels in the nation.
“We’ve made tremendous progress in making walking a more convenient and safe way to get around Washington, but a number of barriers still stand in our way,” said P.G. Sittenfeld, senior policy adviser at the institute.
The Washington,D.C.-based institute has created a list of 13 transportation-related problems in Washington and Maryland that the D.R.I. has identified as a “priority,” and has proposed solutions.
Among the problems listed are: lack of sidewalks, lack of walkways and access to safe, shared space.
The institute has also recommended that the Department of Transportation implement a pedestrian walkable plan, including the construction of a network of walkway and other sidewalks.
“A pedestrian walk is a good example of what could be done to solve these problems,” Sittenfield said.
But some advocacy groups have argued that the National Capital Park Authority and the National Museum of American