The CP Road Map E-News is the newsletter of the Long-Term Plan for Concrete Pavement Research and Technology (CP Road Map), a national research plan developed and jointly implemented by the concrete pavement stakeholder community. The newsletter contains the following articles:

• The April 2015 MAP Brief, "Concrete Pavement Curling and Warping: Observations and Mitigation," describes the mechanisms thought to be responsible for pavement curling and warping and strategies for mitigation.

News from the Road:

• The International Society for Concrete Pavements (ISCP) has announced the 11th International Conference on Concrete Pavements.

• The FHWA has developed a new reference document that summarizes the vast body of research and practical information that has been developed regarding sustainable pavement practices.
• A recent paper in the ACI Materials Journal presents results from a preliminary study that investigated the potential of using drinking water treatment waste sludge as an internal curing agent for concrete.

• The Louisiana Department of Transportation and Development recently investigated the use of polyurethane foam as a way to lift and correct faulted joints.

• Recent research at the University of Illinois developed a back-calculation procedure for bonded concrete overlays of asphalt.

• Ongoing and completed research in Nebraska is addressing research needs outlined by the CP Road Map.