The results indicate that there is a primarily linear relationship between pedestrian volume and right turning vehicles flow with R2=0.6261. Finally, using different regression models, the best relationship between pedestrian’s volume and right turning vehicles flow parameters was evaluated. Only 101 samples of those were ranged as saturated conditions. Each phase of right turn lanes cycle was divided in the pieces of 10-second period which was totally 476 sample volumes of considered pedestrians and vehicles at that period. For this goal, 6 signalized intersections with 90 cycles of reviews were selected for the estimation of saturation flow rate by the microscopic method and also 3 right turn lanes containing radius differences with 70 cycles of reviews were collected for the investigation of the pedestrians’ effects. The purpose of this paper is to estimate the saturation flow rate considering the effect of a pedestrian on right turn movements of the signalized intersections in Rasht city. In addition, the released researches determined that the greatest impact of pedestrian on the saturation flow occurred in the Conflict zone where the highest chance of the encounter of pedestrians and vehicles has in turning movements. Pedestrian crossing on signalized intersection is one of the factors which influence the vehicles flow. Saturation flow rate is one of the important items in the analysis of the capacity of signalized intersections that are affected by some factors. All rights reserved.Įffect of Pedestrians on the Saturation Flow Rate of Right Turn Movements at Signalized Intersection - Case Study from Rasht City Direct field measurements of the saturation flow rate were used while using the air quality mobile lab to calculate emissions' rates. The reduction in fuel consumption and vehicles' emission after modifying the base- saturation flow rate (BSFR increased by 12.45%) was about 34% on average.
SHERRY GLOVER MACOMBO RD DRIVERS
Due to the difference in behavior between drivers in developed countries and their fellows in Kuwait, an adjustment was made to the base- saturation flow rate to represent Kuwait's traffic and environmental conditions. The adopted value in Kuwait is 1800passengercar/h/lane, which is the value that used in this analysis as a basis for comparison. The base- saturation flow rate value in HCM is derived from a field data collected in developed countries.
SHERRY GLOVER MACOMBO RD MANUAL
Highway Capacity Manual (HCM) uses a base- saturation flow rate of 1900-passenger car/h/lane for areas with a population intensity greater than or equal to 250,000 and a value of 1750-passenger car/h/lane for less populated areas. The design and operation of signalized intersections are highly dependent on the base saturation flow rate (BSFR). Therefore, signalized intersections' design and operation is an important parameter to minimize the impact on the environment. Additionally, traffic congestion at signalized intersections has a major contribution in the environmental problem as related to vehicle emission, fuel consumption, and delay.
Transportation and environmental issues are interrelated and affected by the same parameters especially at signalized intersections. Traditional transportation systems' management and operation mainly focused on improving traffic mobility and safety without imposing any environmental concerns. The impact of highway base- saturation flow rate adjustment on Kuwait's transport and environmental parameters estimation.ĪlRukaibi, Fahad AlKheder, Sharaf Al-Rukaibi, Duaij Al-Burait, Abdul-Aziz