Impact of Horizontal Curves and Percentage of Heavy Vehicles on Right Lane Capacity at Multi-lane Highways

Semeida, Ahmed Mohamed

doi:10.7307/ptt.v29i3.2152

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…Estimated capacities were found to differ significantly between the distressed and un-distressed sections. Semeida and El-Shabrawy [1] explored how pavement distresses, pavement roughness, and longitudinal grade affect the operating speed (V 85 ) of traffic on multi-lane roads in Egypt. Using linear regression, it was found that V 85 increased with an increase in the PCI, and it was also concluded that IRI is an effective factor on speed reduction.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Because traffic is a significant controlling parameter on multilane highways, the analysis of traffic flow in terms of flow, speed, and density is necessary. Traffic speed is significant because it influences safety, time, and economics, and it may also be an accurate indicator of pavement condition of roadway facilities [1]. In the planning, estimating, and understanding of road capacity, traffic flow characteristics are essential [2].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Pavement Defects on Traffic Operational Performance

Hashim,

Badawy,

Heneash

2023

Sustainability

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The present research investigates the influence of pavement distresses on traffic operational performance in terms of speed and capacity. The pavement distresses are expressed by the pavement condition index (PCI). Three roads of multi-lane highways located on the road network of Kafrelsheikh governorate, Egypt, were chosen as a case study. Road geometry, pavement condition characteristics, and traffic volume were collected manually from 23 sections for field data surveys. For speed measurements, spot speed data were gathered using the stopwatch method under the free-flow conditions, and the percentile speeds (V50% and V85%) have been calculated for different vehicles classes. Traffic capacity was determined via extrapolation of the quadratic function. Regression analysis models were created to express the relationships of both the percentile speeds and traffic capacity as dependent variables, and three independent variables (PCI, lane, and shoulder widths). These empirical mathematical relations help in developing road design and maintenance works on multi-lane highways. The main conclusion of the study demonstrated that traffic operational performance was more significantly affected by pavement distresses than road geometry. Moreover, the results indicated that pavement distresses have a significant impact on light vehicles more than heavy ones.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Pavement Defects on Traffic Operational Performance

Hashim,

Badawy,

Heneash

2023

Sustainability

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“…Moreover, traffic volume composition is also significantly associated with highway capacity on open-access highways, especially in developing countries such as India and Sri Lanka [3,24]. Researchers also studied the impact of pavement condition on free-flow speed but only for controlledaccess and partially controlled-access highways [25,26]. Another study by Salini and George [2] concluded that the buses stopping at bus stops also obstruct traffic flow on openaccess multilane highways in India.…”

Section: Synthesis Of Past Literaturementioning

confidence: 99%

“…The authors found that factors, such as a high number of pedestrians, bicycles, and vehicle traffic flow, significantly reduced the mean speed on urban roads. Semeida and El-Shabrawy [25] explored the influence of pavement condition, roughness, and longitudinal grade on passenger car operating speed (V85) using three different modeling approaches and identified international roughness index (IRI) as the most critical parameter. Wang [60] developed a relationship between the drivers' speed and the road environment on partially controlledaccess highways.…”

Section: Synthesis Of Past Literaturementioning

confidence: 99%

A Multidimensional Analysis of Factors Impacting Mobility of Open-Access Multilane Highways

et al. 2022

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Open-access multilane highways have a significant share in the highway network of Pakistan and other developing countries in Asia. These highways have high access density, design inconsistency, and other operational characteristics that differentiate them from partially controlled-access multilane highways. This study identified significant factors affecting the mobility of open-access highways based on road users’ perceptions as well as field observations. An interview-based questionnaire survey from local respondents and an in-service road survey formed the database for the present study. Questionnaire survey results showed that heavy traffic was the most critical mobility influencing factor on open-access multilane highways, followed by road width and condition, whereas the result of multilinear regression revealed that the most significant variable was access density, followed by the flow and pedestrian crossings. However, it was concluded that controlling access density, preventing pedestrian crossings, and improving pavement condition will improve the mobility of open-access multilane highways.

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“…Comparison charts were provided with help of CA model for car following car condition and car following truck condition which showed the amount of change occurred due to presence of truck and same study was carried out for different percentage of trucks and it was found that higher percentage of trucks results in higher impact. Semeida (2017) have shown impact of HV in terms of capacity loss that occurred due to various percentage of heavy vehicles.…”

Section: Literature Reviewmentioning

confidence: 99%

Evaluating the Effect of Heavy Vehicles on Traffic Parameters by Using Heavy Vehicle Factor

Patel¹,

Varia²

2018

Int. J. Res. Granthaalayah

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Safe, convenient and timely transportation of goods and passengers is necessary for development of nation. After independence road traffic is increased manifold in India. Modal share of freight transport is shifted from Railway to roadways in India. Road infrastructures continuously increased from past few decades but there is still need for new roads to be build and more than three forth of the roads having mixed traffic plying on it. The impact of freight vehicles on highway traffic is enormous as they are moving with slow speeds. Nature of traffic flow is dependent on various traffic parameters such as speed, density, volume and travel time etc. As per ideal situation these traffic parameters should remain intact, but it is greatly affected by presence of heavy vehicle in mixed traffic due to Svehicles plying on two lane roads. Heavy vehicles affect the traffic flow because of their length and size and acceleration/deceleration characteristics. This study is aimed to analyse the impact of heavy vehicles on traffic parameters.

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Impact of Horizontal Curves and Percentage of Heavy Vehicles on Right Lane Capacity at Multi-lane Highways

Abstract: ABSTRACT

Cited by 3 publications

References 11 publications

Impact of Pavement Defects on Traffic Operational Performance

Impact of Pavement Defects on Traffic Operational Performance

A Multidimensional Analysis of Factors Impacting Mobility of Open-Access Multilane Highways

Evaluating the Effect of Heavy Vehicles on Traffic Parameters by Using Heavy Vehicle Factor

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