Low-cost methods for improving traffic operations on two-lane roads. Informational guide.

This report is an informational guide for highway agencies on the use of low- cost improvements to alleviate operational problems on two- lane highways. The guide addresses both passing and turning improvements that can be constructed for lower cost than construction of a continuous four- lane highway. The passing improvements presented in the guide include passing lanes, climbing lanes, short four- lane sections, turnouts, shoulder driving, and shoulder use sections.