In the analysis of two-lane roads, the passing lane plays a very important role not only in improving the level of service but also in improving safety. This is best shown by a new design of self-explaining roads, or a European implementation of 2+1 roads. The positive effect of improving two-lane roads by passing lanes essentially extends beyond their end. The HCM methodology is mostly used in the region when analysing two-lane roads. The approach has been significantly changed in the seventh edition of the HCM and it cannot be applied in its original form. This article will show how this methodology can be applied under the prevailing road and traffic conditions outside the U.S. environment, especially in countries that do not have a developed capacity analysis methodology. This new methodology again uses density/follower density to determine LOS. The differences in the results of the final improvement will be shown in a particular example by comparison with previous methodologies of HCM and HBS 2015. On the basis of the results obtained, the conclusion will be made on the performance measures that can be applied in our prevailing conditions.

passing lane, follower density, percent followers