Estimation of Capacity of Two-Lane Two-Way Highways Using Simulation Model

Kim, Joonhyo; Elefteriadou, Lily

doi:10.1061/(asce)0733-947x(2010)136:1(61)

Cited by 28 publications

(21 citation statements)

References 6 publications

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“…However, a direct empirical method generally requires a survey to be conducted under capacity conditions, and it also is relatively uncommon for a capacity situation to occur on a regular weekday. As a result, micro-simulation models have been widely used for research purposes in indirect empirical analyses in order to estimate highway capacity in previous studies [8,9,[29][30][31][32][33][34], as this reduces the survey limitations and complex phenomena that are difficult to analyze using mathematical techniques [35]. Individual driver behavior simulations can effectively reflect the traffic characteristics in each area and several studies have used traffic micro-simulation models to identify factors affecting roadway capacity.…”

Section: Capacity Estimationmentioning

confidence: 99%

Evaluation of Effect of Median U-Turns on Multilane Primary Highway Capacity in Thailand through Traffic Micro-Simulation Models

Tanwanichkul

Chaipanha

Pitaksringkarn

2018

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This article aims to analyze the effect of median U-turns and estimate the capacity of primary highways in Thailand using a traffic micro-simulation model. Six-lane and four-lane primary highways were selected for the study. The base condition results determined that the maximum capacity of a six-lane primary highway was 2,130 passenger cars/hour/lane, while the four-lane primary highway capacity was recorded as 2,194 passenger cars/hour/lane. Both results were slightly higher than those of the HCM2010 approach. Under prevailing conditions, both sections exhibited lower capacities than the HCM results by approximately 33.7% and 19.8% for the six-lane and fourlane primary highways, respectively, causing the impact of the median U-turn and highway characteristics in Thailand to directly affect traffic and driving behavior. Using the micro-simulation results, an equation was also regressed for estimating the capacity resulting from the impact of the median U-turns and heavy vehicles. These results may be used as guidelines for the design and analysis of multilane highways in Thailand.

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Section: Capacity Estimationmentioning

confidence: 99%

Evaluation of Effect of Median U-Turns on Multilane Primary Highway Capacity in Thailand through Traffic Micro-Simulation Models

Tanwanichkul

Chaipanha

Pitaksringkarn

2018

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“…For a two-lane highway, this capacity is 1700 and 3200 passenger cars per hour in one direction and two travel directions, respectively [3]. The above capacity values were derived from arrival demand measured at a single location, independent of the interactions at passing zones that are a characteristic of the operation of two-lane rural highways [4].…”

Section: A Definitionmentioning

confidence: 99%

“…A simulation study by Kim and Elefteriadou with 80% passing zones of a highway section concluded that capacity was neither affected by passing zones nor opposing traffic flow rate [4]. This finding was not surprising since capacity estimation was derived from arrival demand independent of traffic interaction effects.…”

Section: A Definitionmentioning

confidence: 99%

Capacity and Safety of Passing Zones on Two-Lane Rural Highways: A Review of Theory and Practice

Mwesige¹,

Farah²,

Bagampadde³

et al. 2014

JTLE

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Passing zones are primary operational features of two-lane rural highways where fast vehicles pass slow vehicles using a lane reserved for traffic in opposing direction. The operation of these zones has an effect on the overall safety of two-lane rural highways especially when passing opportunities reduce considerably at higher flows. This paper presents a review on capacity and safety of passing zones on two-lane rural highways. Despite stated importance of passing zones to the operational performance of two-lane rural highways, passing zone capacity has not been estimated and its impact on safety is still not known. Safety evaluations mainly compare adequacy of design and marking passing sight distances to complete passing maneuvers as well as parameters derived from the passing process namely; passing duration, speed difference between passing and passed vehicles, and clearance between passing and opposing vehicle at the end of the maneuver. There is need for further research to address gaps in current capacity and safety evaluation methods of two-lane rural highways with focus on; (a) development of robust passing rate models for individual passing zones based on geometric, environmental and traffic factors, (b) estimation of passing zone capacity, (c) development of criteria to evaluate capacity and safety of passing zones for use by policy makers, planners and transportation engineers and (d) application of passing zone capacity to evaluate rural highway sections with several passing zones.

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“…Assuming an average vehicle occupancy of 1.6 persons, this translates into 3.7 billion person-hours of delay. Kim and Elefteriadou (2010) [10] Developed a new microscopic si mulation model called TWOSIM for the estimation of capacity for two -way two-lane highway (TWTLHW) under a variety of prevailing traffic and geometric conditions. These include percentage of traffic per direction, presence of a passing zone, a horizontal curve, a driveway, an upgrade, and heavy vehicles.…”

Section: Tementioning

confidence: 99%

Effect of Horizontal Alignment Characteristics on Capacity Loss at Rural Two-Lane Roads

Abdel-Wahed

Hashim²

2012

The International Conference on Civil and Architecture Engineer

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The primary objective of this paper is to explore the impact of horizontal alignment characteristics on capacity and capacity loss at two successive elements, tangent and succeeding horizontal curve. The horizontal alignment chara cteristics include lane width, shoulder width, carriageway width, forward visibility, number of side access points, curve radius, curve length, tangent length, deflection angle and superelevation. Traffic volumes, speeds and densities are used to estimate capacity by extrapolating free-flow observations. Vehicle speeds and flows on the two successive elements were recorded for each five-minute intervals during the survey period, enabling the capacities of the two elements to be estimated and capacity loss d etermined. The effect of different types of vehicle within the traffic stream is normally accommodated for by converting vehicles into passenger car units (PCU) using PCU values. Correlation and regression analyses are used to investigate the relationships between horizontal alignment characteristics and capacity and capacity loss. Several models are introduced to indicate these relationships and the best one was chosen for each case (i.e. capacity at tangents, capacity at curves and capacity loss between t he two successive elements).

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Estimation of Capacity of Two-Lane Two-Way Highways Using Simulation Model

Cited by 28 publications

References 6 publications

Evaluation of Effect of Median U-Turns on Multilane Primary Highway Capacity in Thailand through Traffic Micro-Simulation Models

Evaluation of Effect of Median U-Turns on Multilane Primary Highway Capacity in Thailand through Traffic Micro-Simulation Models

Capacity and Safety of Passing Zones on Two-Lane Rural Highways: A Review of Theory and Practice

Effect of Horizontal Alignment Characteristics on Capacity Loss at Rural Two-Lane Roads

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