Updated August 27, 2022

Roundabouts are increasingly being used for handling traffic at intersections, and for many state highway agencies, concrete is the pavement of choice for that application.  Concrete can better handle channelized traffic without deforming, and to assist the design community, PennDOT has developed standards for jointing roundabouts.  There are only seven concrete roundabouts in Pennsylvania, all near Interstate 70 between New Stanton and Bentleyville. Read about the first concrete roundabout constructed in the Commonwealth of Pennsylvania.
There is a difference between cement and concrete.  For those who have ever made the mistake of using the words “cement” and “concrete” interchangeably, a 1963 Pennsylvania Supreme Court Opinion, authored by Supreme Court Justice Michael A. Musmanno, is a mandatory read.