U.S. Cities Test Alternatives to Asphalt Parking Lots

Cities and civic groups across the United States are replacing sections of traditional asphalt parking lots with cooler and more permeable materials. The projects seek to lower surface temperatures and reduce stormwater runoff, particularly as climate patterns shift.

Conventional asphalt absorbs and retains heat, raising local temperatures during warm months. Permeable pavements and lighter-colored surfaces allow water to pass through and reflect more sunlight. Several municipalities have begun pilot installations in public lots and along streets to measure temperature and drainage differences.

Participating cities are testing materials such as porous concrete, permeable pavers, and reflective coatings. Groups involved include local public works departments and nonprofit organizations focused on urban infrastructure. Data collection on surface temperature, water infiltration rates, and maintenance costs is under way at multiple sites.

Results from these installations are expected to inform decisions on whether to expand the approach to additional locations.