Modeling the Level of Service of the Non-Motorized Vehicle Crossing the Signalized Intersection

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Ye Yao ◽  
Xiaofei Ye ◽  
Zhen Yang ◽  
Qiming Ye ◽  
Chang Yang
Keyword(s):  
Signalized Intersection ◽  
Level Of Service

scholarly journals An Improvement of Three Leg Signalized Intersections in Duhok City Kurdistan-Iraq

2018 ◽  
Vol 7 (4) ◽  
pp. 87
Author(s):  
Baran R. Omer ◽  
Sherzad W. Khalid
Keyword(s):  
Cycle Time ◽  
Signalized Intersections ◽  
Signalized Intersection ◽  
Level Of Service ◽  
Remarkable Improvement ◽  
Iraqi Kurdistan ◽  
Length Changes ◽  
Time Changes ◽  
Geometric Changes ◽  
The City

Nowadays, number of cars increases in Iraqi Kurdistan. Duhok is one of the Iraqi Kurdistan cities where an enormous increase in the number of cars and population is noticed during the last decade. Roads were been mended according to the 1970s plans where the city was small and number of cars was few. Although the city geographically is located in a hilly area and between two mountains, mending roads is a problem of area. Roads in the mentioned city are quite busy due to the high number of cars, traffic jams can be noticed in every corner of the city especially in signalized intersections. The level of service (LOS) in most of the signalized intersections is F or E. in order to lower the high (LOS), a three leg signalized intersection has been chosen to do an improvement on. During the study the number of the cars (Volume) have been enumerated in all lane groups and the results showed that the (LOS) was E in the intersection. As a result, some solutions have been provided according to the site area and the traffic flow. Solutions were geometric changes, cycle time changes or combination in both geometric and cycle time changes. According to the collected data, it was found that level of service was E for WB and SB and for EB was D. Based on data analysis it was found that LOS has not been improved when only one of the mentioned solutions is applied. In order to have the best improvement, the combination between geometric and cycle time length changes are applied. Analysis showed that there was a remarkable improvement in LOS and changed from E to D.

Research of Signalized Intersection Delay Problem by Time Series and Queuing Theory

2012 ◽  
Vol 253-255 ◽  
pp. 1623-1626 ◽  
Author(s):  
Lian Xue
Keyword(s):  
Time Series ◽  
Queuing Theory ◽  
Reference Value ◽  
Signalized Intersection ◽  
Complete Analysis ◽  
Level Of Service ◽  
Signal Timing ◽  
Delay Model ◽  
Scientific Model ◽  
Operation Characteristics

Signalized intersection delay is an important evaluation index of the signalized intersection capacity and level of service. This paper presents a signalized intersection delay model for signalized intersection. The model uses time series and queuing theory. It discusses the operation characteristics of the process of arrival and leaving and optimizes the intersection signal timing and gets the best signal cycle time. A scientific model and a more complete analysis are founded in the paper. These methods have a good reference value to the relevant departments.

Analysis on Capacity and LOS of Signalized Intersection in Slight Snowy Weather

2012 ◽  
Vol 209-211 ◽  
pp. 930-933 ◽  
Author(s):  
Chun Xiao Liu ◽  
Guo Zhu Cheng ◽  
Ya Ping Zhang
Keyword(s):  
Signalized Intersections ◽  
Signalized Intersection ◽  
Level Of Service ◽  
Line Method ◽  
Sunny Weather ◽  
American Standard ◽  
Operation Status ◽  
Traffic Operation ◽  
Stop Line

In order to evaluate traffic operation status of signalized intersection in slight snowy weather, it was studied that the influence of slight snow on capacity and level of service (LOS) of signalized intersection. Data of timing, vehicle’s starting loss time, saturated headway of straight vehicle and delay of one signalized intersections in sunny and slight snowy weather were observed by video method. Stop-line method was adopted to calculate the capacity of signalized intersection and LOS was evaluated by American standard. It showed that capacity of signalized intersection decreased by 7% and LOS declined one level in slight snowy weather compared with on sunny weather.

QUANTITATIVE APPROACH TO DETERMINE PEDESTRIAN DELAY AND LEVEL OF SERVICE AT SIGNALIZED INTERSECTION

2018 ◽  
Vol 6 (1) ◽  
pp. 06-13
Author(s):  
Ammu Gopalakrishnan ◽  
Sewa Ram ◽  
Pradip Kumar Sarkar
Keyword(s):  
Empirical Model ◽  
Cycle Time ◽  
Quantitative Approach ◽  
Heterogeneous Traffic ◽  
Signalized Intersection ◽  
Level Of Service ◽  
Physical Parameters ◽  
Linear Regression Models ◽  
Traffic Conditions ◽  
Motorized Vehicles

Purpose: Level of Service is a widely adopted terminology to determine the efficiency of any transport system. From the literature it was studied that the multiple linear regression models established by many researchers to determine PLoS evolved with addition or removal of one or more physical parameters or with respect to the perception of users from different locations. At an intersection, there is little or no established methodology developed so far to determine a quantitative approach for PLoS similar to Vehicular Level of Service (VLoS). It was also pointed out that under heterogeneous traffic conditions, pedestrians are most vulnerable at intersections and they share the same space with motorized vehicles for crossing movements. Methodology: Thus, this study was built on the hypothesis that pedestrian delay of a signalized intersection is quantitatively dependent on pedestrian volume, vehicular volume and cycle time. Two signalized intersections operating as fully actuated and fixed cycle time were considered for study for period of four hours each, covering two hours of morning peak and off-peak hour traffic data. Main Findings: Using various statistical techniques, an empirical model was developed between the pedestrian delay and independent variables namely cycle time, pedestrian volume and vehicular volume. PLoS range was also determined through k-means clustering technique. Implications: The empirical model developed was validated and the application of this research was also explained. Novelty: The study is a new quantitative approach to determine PLoS and was limited to two intersections. Increase in the data may improve the accuracy of the model.

Phase Time Prediction for Traffic-Actuated Intersections

1996 ◽  
Vol 1555 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Pei-Sung Lin ◽  
Kenneth G. Courage
Keyword(s):  
Field Studies ◽  
Signalized Intersection ◽  
Level Of Service ◽  
Signal Timing ◽  
Highway Capacity ◽  
Traffic Demand ◽  
Highway Capacity Manual ◽  
Time Prediction ◽  
Traffic Characteristics ◽  
General Reliability

The Highway Capacity Manual (HCM) provides a methodology in Chapter 9 to estimate the capacity and level of service at a signalized intersection as a function of traffic characteristics and signal timing. At traffic-actuated intersections, the signal timing changes from cycle to cycle in response to traffic demand. An accurate prediction of average phase times and their corresponding cycle length is required to assess the performance of intersections controlled by traffic-actuated signals. The current technique suggested in Appendix II of HCM Chapter 9 for this purpose has not been well accepted. A more comprehensive methodology and a more satisfactory analytical model are described that predict traffic-actuated signal timing for both isolated and coordinated modes with actuated phases. The proposed methodology and model have been verified by simulation augmented by limited field studies. The results are encouraging with respect to their general reliability and their compatibility with the current HCM Chapter 9 structure.

Simulation of Signalized Intersection Model

2013 ◽  
Vol 401-403 ◽  
pp. 2159-2162
Author(s):  
Lian Xue ◽  
Qiong Ying Xie
Keyword(s):  
Queuing Theory ◽  
Reference Value ◽  
Signalized Intersection ◽  
Complete Analysis ◽  
Level Of Service ◽  
Signal Timing ◽  
Delay Model ◽  
Scientific Model ◽  
Intersection Model ◽  
Operation Characteristics

Signalized intersection delay is an important evaluation index of the signalized intersection capacity and level of service. This paper presents a signalized intersection delay model for signalized intersection. The model uses time series and queuing theory. It discusses the operation characteristics of the process of arrival and leaving and optimizes the intersection signal timing and gets the best signal cycle time. A scientific model and a more complete analysis are founded in the paper. These methods have a good reference value to the relevant departments.

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