The pros and cons of asphalt and concrete for roads
The Portland Cement Association has put up a billboard on I-94 to publicize the message that concrete lasts longer than asphalt on roads. But a rival trade group, called the Minnesota Asphalt Pavement Association, counters that asphalt is more cost effective and environmentally friendly than concrete. MPR's Cathy Wurzer spoke with Dave Sonnenberg, a transportation consultant based in Minneapolis, who used to be the city's public works director.
- Morning Edition, 07/08/2010, 7:45 a.m.