Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 22 Issue 1

Figure 5: The existing signal phases in vissim The simulation using PTV vissim for the existing conditions were obtained a level of service (LOS) C with a delay of21.61 seconds/vehicle. Major significant parameters were shown in Table 3. The level of service was similar with the existing condition however the congestion time increased 23 percent in 2022 and 275 percent in 2025. Table 3: The analysis results of intersection for the existing condition and future № Parameters 2020 2022 2025 1 Level of service (LOS) C C E 2 Vehicle delay (sec) 21.61 26.68 59.25 3 Queue length (m) 16.55 28.28 93.9 4 Maximum queue length (m) 83.35 119.23 231.42 5 All stops 0.74 0.94 2.65 6 All vehicles 5509 6245 7155 7 Emission CO (gram) 7993.22 10019.28 20583.15 8 Emission NOx (gram) 1555.19 1949.39 4004.73 9 Emission VOCs (gram) 1852.506 2322.067 4769.884 10 Fuel consumption (liter) 423.1 530.35 1089.52 Currently, more than 0.5 mln vehicles are registeredat Tashkent and an average of several hundred vehicles are coming and leaving the city per day. Dynamic relations of daily traffic are unknowable. The analysis shows that an average more than 55,000 vehicles are observed at the intersection daily. Traffic engineers use projection of future traffic to make recommendations and decisions on transportation investments each year.Most traffic projection models rely on linearprojections of past traffic counts. By the traffic modeling using a PTV vissim model is to be analyzed the performance of parameters of the intersection. Separate analysis and evaluation are required in cases where traffic flows may vary significantly during rush hour in the morning and afternoon. The linear increment (cumulative) method was used to predict traffic flow. It was calculated traffic flow projection with 7% growth rate per year in Table 4. Table 4: Traffic flow projection Йил Hourly traffic volume(with growth rate 7%) 2020 5500 2022 6200 2025 7700 2030 10800 b) First alternative for improving intersection performance The intersection improvement by applying the first alternative was carried out by redesigning the green time interval and optimization with computer PTV vissim simulation. The results areas shown in Table 5. The modelling results of the first alternative were defined a level of service B with a delay of 16.06 seconds/vehicle. The level of service was not similar with the existing condition and vehicle delay time decreased 25 percent. 1 Year 2022 23 © 2022 Global Journals Global Journal of Science Frontier Research Volume XXII Issue ersion I VI ( H ) Assessing the Operational Impacts of Road Intersection using PTV Vissim Microscopic Simulation