Application of GIS to assess the accessibility of urban streets in Baghdad city

Accessibility has an important impact on shaping human activity patterns on all of the spatial scales. This study presented an evaluation of accessibility levels with private to commercial centers for three selected routes in Baghdad city. The study involved more than 45 days transport survey for private vehicles in Baghdad city using Global Positioning System (GPS) probe for recording indicators of traffic performance. Gravity model was used to measure accessibility index as an implementation of GIS-based model by using link geography and the spatial boundary of analysis in order to build route networks at three routes in Baghdad City, Bayaa intersection - Bab Al-Muatham intersection (Route 1), Bayaa intersection - Bab Al-Muatham intersection (Route 2) and 14 Ramadan Street - Bab Al-Muatham intersection (Route 3). It was found that Route 1 has the high accessibility index with 0.67 in compare with Route 2 and 3 (0.58 and 0.59), respectively. The reason that Route 1 had the highest accessibility index due to the high access point and low traffic volume as compared with the other two routes.

Analisis Pengaruh On-Street Parking terhadap Kinerja Jalan di Pasar Jaya Ciracas, Jakarta Timur

This research contains an analysis of the traffic performance by dint of on-street parking, afterward the results are compared with the traffic performance if a scenario is made that there is no on-street parking activity. The purposes of this research are to determine the impact of on-street parking to road performance also to perceive the road level of service. The method used in this research is a quantitive method by direct field research. The results of this research are on-street parking activity around Jaya Ciracas Market affected the traffic performance with a difference in road capacity about 39,03%. The value of the road level of service when there is on-street parking activity is D, while when on-street parking is abolished, the road level of service can increase to C.

Estimation of Traffic Delay Due to U-Turns at Uncontrolled Medians: Case Study in Phnom Penh, Cambodia

Lack of infrastructure capacity to the demand in mobility results in delays in traffic. U-turns restrict the movement of the opposing through-traffic during the maneuver, hence triggering delays. Significant delays can be observed, especially in high volume traffic, where U-turning is not restricted. Hence, it is imperative to study the delays incurred by the U-turning vehicles to assess their impacts on traffic congestion. This study thus proposes a quantitative method to estimate the aggregate and average delay per vehicle caused by U-turns at uncontrolled medians of urban roads. Traffic data were collected at a corridor where vehicles were allowed to U-turn on a four-lane divided mixed traffic urban road in Phnom Penh, Cambodia. The delay in the opposing lane of traffic was calculated by analyzing the data using a novel analytical method; a derivative of the Webster’s delay model. The results reveal that the suggested technique evaluates the caused delay with good accuracy. Excessive traffic delay and about three seconds delay per vehicle in the through-traffic of the opposite lane align well with the experienced delay at the site. The method can be used to assess the delay at straight corridor sections where U-turns are not restricted, understand the causes of the delay, and develop control measures for improved traffic performance.

Analisa Penyebab Kemacetan Dan Kecelakaan Jalan Raya Ngaliyan Kota Semarang Tanjakan Silayur

A traffic accident is a tragedy or accident that occurs on the road involving a motorized or heavy vehicle with other road users or without a vehicle. This incident caused the victim to suffer physical, health and material losses. Traffic accidents occur due to several factors such as human error or inadequate road conditions. Even traffic jams can also lead to traffic accidents. The problem of driving and road safety needs to be considered to reduce the number of traffic accidents that occur. This study was conducted to determine the factors that cause accidents, especially those caused by road conditions and traffic performance. The method used in the field observation research and using data on the number of accidents in 2018–2020 located on Jalan Raya Ngaliyan which was taken from the accident data of the West Semarang Police Traffic Unit. The level of road performance on Jalan Tanjakan Silayur Semarang City, at peak hours in the morning and non-peak hours during the day category C and at peak hours in the afternoon category E. Damage to the flexible pavement surface on Jalan Tanjakan Silayur is dominated by the type of damage cracks, grooves, and bleeding. One of the factors that caused the accident was because the traffic signs were not optimal on the Jalan Tanjakan Silayur section.

Analisis Kinerja Lalu Lintas Simpang Tak Bersinyal untuk Penentuan Tingkat Pelayanan di Jalan Klampis Jaya Surabaya

Klampis Jaya Road, Surabaya City, has a fairly heavy traffic flow, especially during working hours. This resulted in congestion on Klampis Jaya Road and not a few motorists who violated traffic regulations such as turning around Mleto Road. This study aimed to determine the current traffic flow performance and in 2024 at the intersection on Klampis Jaya Road, Surabaya City, predicted the traffic flow performance around the road and intersection on Klampis Jaya Road Surabaya City. The research method used was non-signalized intersection analysis using the Indonesian Road Capacity Manual. The calculation of the traffic performance of the four intersections in Klampis Jaya showed the Degree of Saturation (DS) and Service Level (TP) of each intersection. Traffic performance for the four intersections in 2021 was DS = 0.752 and TP = C (Enough), with the characteristics of stable traffic flow, was restricted movement. The traffic performance for the four intersections in 2024 was DS = 0.95 and TP = D (Less), with the characteristics of traffic flow stable movement being limited.

Evaluasi Kinerja Simpang Bersinyal Jl. Arief Rahman Hakim-Jl. Klampis Anom-Jl. Klampis Jaya Surabaya

The intersection between Arief Rahman Hakim Street, Klampis Anom Street, Klampis Jaya Street is a signalized intersection with a high-density level due to trip generation and attraction. The low level of knowledge and culture of traffic is the phenomenon of vehicle congestion at the intersection involving many actors as the cause. This study aimed to determine the traffic performance of the signalized intersection at the Arief Rahman Hakim Street, Klampis Anom Street, Klampis Jaya Street at this point as well as to predict the traffic performance of the signalized intersection on the Arief Rahman Hakim Street,Klampis Anom Street, Klampis Jaya Street in 2024. The results of the performance evaluation of the signalized intersection on the Arief Rahman Hakim Street, Klampis Anom Street, Klampis Jaya Street was for the standard degree of saturation received in 2021; it was 4.33 in the north, 0.23 in the south, 3.17 in the east, and 2.98 in the west. In 2024 it will be 4.96 in the north, 0.36 in the south, 3.49 in the east, and 3.41 in the west. In 2024 the rate of population growth and the need for private vehicles will increase greatly.