An Improved Algorithm for Highway Design Hourly Volume Calculation

The designed hour traffic volume is an important parameter in the construction of highway toll station. It is usually calculated by using the ratio of the 30th traffic volume and annual average daily traffic volume. Based on toll data of Shaanxi highway, the method of calculating 30th hour traffic volume was improved in the paper. After deducting the national legal holiday period for the free passage of small passenger cars ， the ratio of hourly traffic volume in smooth and annual average daily traffic was obtained as the designed hour traffic volume coefficient. This algorithm is more scientific and accurate and easy to implement. It meets the requirement of highway toll station traffic volume forecast.