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Publication Number: FHWA-SA-97-024
Date: June 1997
What do you get when you narrow the width of transverse joints in portland cement concrete pavements? A savings of as much as $4 million. That's the amount the Arizona Department of Transportation (DOT) expects to save by allowing joints as narrow as 3 mm (1/8 in) on 160 km (100 mi) of new concrete pavements to be built in the State.
The January-February 1997 TR News, published by the Transportation Research Board (TRB), is devoted to SHRP.
As the Superpave mix design system takes hold across the country, highway agencies, contractors, and others are asking questions about the system. Here are answers to some of the most frequently asked questions.
Looking for a way to prevent permanent deformation-or rutting, as it is commonly known-in asphalt pavements? Heed the Superpave aggregate gradation specifications. That's one of the findings of a study of data from the long-term pavement performance (LTPP) program's general pavement studies (GPS) experiments.
When implementing complicated new technologies, one way to make the process easier is to learn from others' experiences. That's why Oklahoma Transportation Secretary Neal McCaleb recently sent two representatives to Nevada to learn about road weather information systems (RWIS) and anti-icing strategies. Nevada is one of the members of the Lead States Team for RWIS/Anti-Icing (see November 1996 Focus).
When governments in developing countries or in countries where the economy is in transition want to improve their transportation systems, they turn to the World Bank for financial and technical assistance. To better prepare its staff to respond to the growing number of inquiries about the Superpave system, the World Bank recently held an in-house seminar.
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