Construction of new road sections frequently changes the previous role of the road in the pertaining road network. This is particularly distinct in construction of urban bypass roads where the traffic structure on the existing road changes and once dominant transit traffic yields its function to local traffic. Accessibility of such roads must be improved, in order for them to meet their new demands. This paper analyzes the consequences of such change in the road accessibility level under unchanged geometry-related conditions, along with the traffic calming measures introduced to minimize the pertaining negative effects. The discussed traffic calming measures include changes in cross section, selection of type and frequency of intersections designed to improve the road accessibility and traffic management actions. Effects of potentially applied measures were assessed through design speed profile analysis, paying the utmost attention to the impact of roundabouts on the expected speeds. The specific study case in this analysis is an arterial road section built as a two-lane road with controlled access and grade-separated intersections. After construction of a new motorway bypass, the given section will, instead of being a transit facility, assume a role of an urban peripheral road.
Abstract