This synthesis will be of interest to maintenance engineers, traffic engineers, and others interested in the management aspects of maintaining urban freeways. Information is provided on techniques and procedures used by agencies to improve and speed up maintenance procedures, schedule work, and coordinate freeway lane closures. Maintenance of aging urban freeways is difficult because of the high volumes of traffic on these facilities. This report of the Transportation Research Board describes techniques and procedures that highway agencies are using, such as reducing work time and scheduling work for off-peak periods, to minimize traffic delays while freeway maintenance is performed.

The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.