Abstract
Estimating travel time and measuring speed are critical for increasing the efficiency and safety of traffic road networks. This study presents an investigation of arterial travel time estimation for vital routes in Baghdad city. These estimations including speeds, stops, and delays were computed via GPS device and compared to those currently used to quantify congestion and travel time reliability. The study involved a 45-day survey of private vehicles in Baghdad utilizing a Global Positioning System (GPS) probe to collect data on traffic performance metrics for analysis in a GIS context. It was found that the proposed travel time performance measures show definite differences in estimates of peak-hour travel time as compared with weekend travel time. Route (1) from Bayaa intersection - Bab Al-Mutham intersection (through highway) produced a travel time of 165 minutes and 136 minutes for Bayaa intersection - Bab Al-Mutham intersection (through downtown). The travel speed of routes 1 and 2 are observed near 25 kmph which is below the local speed limit of 70 kmph. The maximum travel time of routes 1 and 2 are 71 minutes and 37 minutes, respectively. While delay time was observed 45 and 20 minutes due to traffic congestion on route 1 and 2, respectively. The majority of vehicles are capable of traveling at normal speeds, with relatively few exceeding them.
Highlights
The travel time of an urban arterial in a city is cr ucial when evaluating the performance of a traff ic transportation system [1,2]
Hunter et al (2006) described a feasible technique for collecting and evaluating trip time data using Global Positioning System (GPS) that accurately reflects performance indicators for segments as well as long arterial sections. This strategy is predicated on the idea that both average travel speed and average junction approach delay can be estimated as functions of arterial segment travel time, with travel time serving as the primary field measurement for evaluating arterial performance
It is connected to the road's traffic conditions, which are regulated by a check point near the Bab Al-Mutham intersection, resulting in excessive delays of up to five minutes during peak hours, resulting in vehicles coming to a complete halt and going slowly
Summary
The travel time of an urban arterial in a city is cr ucial when evaluating the performance of a traff ic transportation system [1,2]. Hunter et al (2006) described a feasible technique for collecting and evaluating trip time data using GPS that accurately reflects performance indicators for segments as well as long arterial sections. This strategy is predicated on the idea that both average travel speed and average junction approach delay can be estimated as functions of arterial segment travel time, with travel time serving as the primary field measurement for evaluating arterial performance. 2. Objective of the Research The goal of this study is to calculate total travel time and conduct a speed distribution analysis on two selected routes in Baghdad, which are considered to be the city's most important residential and commercial areas due to the drastic changes that may impact daily trip generation and attraction.
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