Analysis of traffic flow indicators on arterial streets of Lviv city
Students Name: Berezdetskyi Artur Ihorovych
Qualification Level: magister
Speciality: Traffic Control and Organization
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2023-2024 н.р.
Language of Defence: ukrainian
Abstract: Today, the transport industry is used in all spheres of activity. Accordingly, the intensity and loading of the transport network increases, as well as the level of accidents. This is especially noticeable in big cities. Therefore, this paper investigated how traffic conditions affect the change in the speed of the traffic flow. Many factors affect the speed of movement, in particular, the psychophysiological properties of the driver. Speed is the most important parameter for traffic flow. It has the greatest impact on traffic safety and determines traffic performance. The objects of the study were Naukova, Stryyska and Troleybusna streets. Field studies were conducted at each of the races, with the help of which primary indicators were collected: intensity, flow composition, density and speed. Street races were chosen with different number of lanes (3x3, 2x2, 1x1) and flow composition in order to compare how traffic conditions affect the speed of traffic flow. During the execution of the work, on-site research was carried out at stationary posts on the crossings of Naukova, Stryyska, Troleybusna streets with traffic lanes 1x1, 2x2 and 3x3, respectively. The actual intensity and composition of the flow is determined. Intensity on the street Naukova is 1465 cars/hour in the direction of St. Kulparkivska and 1480 avt./h in the direction of St. Stryyska, on St. Stryyska speed 1465 cars/hour from the center, 1070 cars/hour to the center, on the street The trolley bus speed is 240 cars/hour to the street. Naukova and 295 auto./hour to St. Volodymyra Velykogo. A comparison was made of how the change in the share of cars from the composition of the flow will affect the average speed of the traffic flow. It can be concluded that with an increase in the share of passenger cars, the speed of traffic increases on the street. Trolleybus with 1x1 traffic lanes, St. Stryyska 2x2 and st. Scientific 3x3. As the share of passenger cars increases from 10% to 100%, the speed increases and ranges from 56 to 63 km/h, from 40 km/h to 63 km/h, and from 42 km/h to 63 km/h, respectively. The average speed of traffic is the highest on Troleybusna Street, as the TP includes only passenger and freight vehicles. On Stryyska and Naukova streets, the average speed is lower, as a large share of public passenger and freight transport is observed in the TP flow. When the composition of the flow is 100% passenger cars, the average speed of traffic on the streets is the same. At the final stage, the street was investigated. Naukova (3x3 lanes) real saturation flows for each traffic lane and capacity for one option: with the composition of the flow of passenger cars 61%, high-speed trucks 5%, low-speed trucks 7%, buses 23%, trolleybuses 4%. It was found that bands 1 and 2 are the most saturated, band 3 is the least saturated. The throughput was also calculated according to E.M. Lobanov, which is 4104 units/hour, and when modeling in the "PTV VISSIM" program - 4766 units/hour Therefore, it can be concluded that in the future it is better to perform calculations in the "PTV VISSIM" software environment with modern dynamic characteristics. Key words – indicators of traffic flow, intersection, road traffic, speed, intensity, density. References. 1. Murovanyi I. S. Vyznachennia, analiz ta rehuliuvannia isnuiuchykh parametriv transportnoho potoku / I. S. Murovanyi, V. V. Hrabovets, A.I.Matviishyn // Mizhvuzivskyi zbirnyk «Naukovi notatky» [Lutskyi natsionalnyi tekhnichnyi universytet]. – Lutsk, 2012. – № 36. – s. 204 – 208. 2. Vikovych I.A. Orhanizatsiia dorozhnoho rukhu: Konspekt lektsii dlia studentiv bazovoho napriamu “Transportni tekhnolohii”./ Vikovyi I.A., Zhuk M.M., RoikoIu.Ia. – Lviv: Vydavnytstvo Natsionalnoho universytetu “Lvivska politekhnika”, 2005. – 159 s. 3. Polishchuk V. P. Orhanizatsiia ta rehuliuvannia dorozhnoho rukhu: Pidruchnyk / V. P. Polishchuk, O. O. Bakulich, O. P. Dziuba, V. I. Yeresov, O. V. Krasilnikova, O.V.Khrystenko. – K.: Znannia Ukrainy, 2012. – 467 s. 4. Roiko Yu.Ia. Doslidzhennia dorozhnoho rukhu na vulychno-dorozhnii merezhi mista: Praktykum do vykonannia laboratornykh robit z dystsypliny “Orhanizatsiia dorozhnoho rukhu (chastyna 1)” bazovoho napriamu 1004 “Transportni tekhnolohii” / Ukl.: Yu.Ia. Roiko, M.M. Zhuk, I.V. Konyk, B.M. Divieiev, R.B. Rohalskyi – Lviv: Vydavnytstvo Natsionalnoho universytetu “Lvivska politekhnika”, 2005. – 45 s. 5. Bespalov D. Modeliuvannia transportnoho potoku na peretynakh v riznykh rivniakh [Elektron. resurs]. – Rezhym dostupu: http://bespalov.me/2014/01/08/modelyuvannya-transport 6. PTV VISSIM 8 [Elektron. resurs]. – Rezhym dostupu: http://vision-traffic.ptvgroup.com/en-us/products/ptv-vissim/.