Keeping traffic on the move


By Mark D. Blow, P.E.

Customer surveys show one undeniable fact; motorists do not like construction zones.

Congestion on unimpeded roadways is bad enough without having to deal with orange barrels and cones. Many pavement engineers striving to minimize the disruption are choosing asphalt. The mantra of “Get In, Get Out, Stay Out” is elevated in importance, as increasing traffic levels outpace capacity improvements.

Turning the volume down


Reducing road noise with pavement design

By James Careless

Complaints about traffic-generated road noise are certainly not new.

In fact, the first law regulating road noise was passed in Rome in 44 B.C. Julius Caesar declared “no wheeled vehicle whatsoever will be allowed within the precincts of the city, from sunrise until the hour before dusk. Those which shall have entered during the night, and are still within the city at dawn, must halt and stand empty until the appointed hour.”

Of course, the issue in Roman times was iron-rimmed horse carriage wheels running over stones. In the 21st century, the issue is automobile tires pressing against pavement – both asphalt and concrete.