Development of Capacity Calculation Methods of the First and Second Lanes of a City Street

Abstract

The increase in traffic intensity on the streets of modern cities leads to the need to take significant measures to increase the capacity of the corresponding sections. The main measure to increase the capacity of city streets is the
construction of additional traffic lanes. Often this construction involves adding a second lane in one direction to a two-lane city street and converting it into a four-lane street.

Intensive maneuvering of vehicles when turning right, left, or stopping at the edge of the roadway leads to the creation of individual traffic conditions along the corresponding first and second lanes of the street. Queues of vehicles, both moving and stationary, lead to a decrease in the capacity of lanes and streets, to the formation of shock waves in the traffic flow and the formation of congestion.

The above reveals the relevance and need to improve the existing methodology for assigning the capacity of the corresponding traffic lanes of city streets, to the level of a calculation methodology that takes into account the individual characteristics of maneuvering vehicles within a specific street section.

The article develops methods for calculating the capacity of the first and second lanes of a city street. The methods take into account the speed of free movement of vehicles along the lanes; maximum vehicle traffic densities on lanes; average and maximum intensity of pedestrian traffic in conditions of the presence of surface pedestrian crossings; average traffic densities of traffic flows along the lanes; vehicle maneuvering characteristics when changing lanes; characteristics of vehicle maneuvering in conditions of detour of a vehicle standing at the edge of the roadway of the first lane; characteristics of the kinematics of vehicle movement when making a right turn for the first lane and when making a left turn for the second lane.