Normalized Volume Measurement for Nonmotorized Traffic Flow Mixed with Mopeds

Chen, Xiaohong; Han, Hui; Ye, Jianhong; Ma, Shijiang; Xu, Y.

doi:10.3141/2239-02

Cited by 9 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BE values should not be considered as constants because they may be affected by characteristics related to traffic conditions or road design. Traffic flow density was found to have a strong influence on the BE by Chen et al who reported that BE of mopeds fluc tuated around one with different densities (5). The present study attempts to (a) estimate the BE for different proportions of mixed non motorized traffic flow at different observation sites and (b) dis cuss the influence of different factors on the BE.…”

mentioning

confidence: 84%

“…Differences in vehicle width could be used to represent differences in occupied area when vehicle lengths are similar. Generally, the width of mopeds is between 60 and 70 cm (average 65 cm), and the width of bicycles is between 55 and 60 cm (average 57.5 cm) (5).…”

Section: Methods Of Analysis Of Bementioning

confidence: 99%

“…Chen et al introduced a BE concept to measure mopeds in terms of equivalent bicycle units and normalized mixed moped and bicycle traffic flow (5). They proposed a method for observing and calcu lating the BE and introduced a case study of one site.…”

Section: Developing Bicycle Equivalents For Mopeds In Shanghai Chinamentioning

confidence: 99%

See 2 more Smart Citations

Developing Bicycle Equivalents for Mopeds in Shanghai, China

Chen

Han

Lin

2012

Transportation Research Record

Self Cite

View full text Add to dashboard Cite

The bicycle equivalent (BE) of the moped is a key nonmotorized traffic flow parameter when bicycles and mopeds share the same lanes. However, this parameter should not be considered a constant, because it may be affected by factors such as the mixed proportion of the nonmotorized traffic flow. This study estimated the effects of traffic flow characteristics and road design parameters on the BE. Basic traffic flow parameters (i.e., flow, density, and speed) were extracted from video data collected at three observation sites in Shanghai, China. A concept method was used to calculate the BE of mopeds in terms of their time–space resource occupancy on traffic facilities. The free-flow speed characteristics of bicycles and mopeds were investigated, and relationships between speeds and densities in the mixed traffic flow were analyzed. The BEs were estimated for a range of characteristics related to traffic condition or road design (i.e., moped percentage, traffic flow density, width of nonmotorized traffic lanes, and nonmotorized traffic lane grades). The effects of these characteristics on the BE and the variation trends of the BE were observed, and reasons for these trends are discussed. The study findings provide valuable support for the measurement of nonmotorized traffic mixed with mopeds and bicycles in different traffic and road design conditions and could support future studies for capacity and level of service of dedicated nonmotorized lanes.

show abstract

mentioning

confidence: 84%

Section: Methods Of Analysis Of Bementioning

confidence: 99%

See 1 more Smart Citation

Developing Bicycle Equivalents for Mopeds in Shanghai, China

Chen

Han

Lin

2012

Transportation Research Record

Self Cite

View full text Add to dashboard Cite

show abstract

“…Following the prohibition of most MCs in the major cities of China in 2004 (5), mopeds have been gradually replacing both bicycles and MCs; recently mopeds have become the most common personal motorized travel mode in China (6). For example, in Shanghai, China's most populous city at 22 million as of 2011, mopeds constitute more than 50% of all riding vehicles (6). This increasing use of mopeds in China has been accompanied by a sharp increase in moped crashes.…”

mentioning

confidence: 99%

Moped Rider Violation Behavior and Moped Safety at Intersections in China

Wang

Tremont

et al. 2012

Transportation Research Record

Self Cite

View full text Add to dashboard Cite

The study identified moped rider violation behavior leading to conflicts and crashes to help guide future countermeasure development. Mopeds (electric bicycles and light motorcycles) are a commonly used personal transportation mode in China, and moped crashes are increasing rapidly. This increase in crashes may be attributable to certain traffic behavior of moped riders. Video recordings were used to acquire data on moped riders' violation behavior and the violation behavior of bicycle, tricycle, and motorcycle riders at signalized intersections. One hundred twenty-five min of video were recorded from 10 intersections, and rider behavior was coded from 1,455 vehicles. Video data showed that moped riders committed more violations than did riders of bicycles, tricycles, and electric bicycles and that moped riders who engaged in violation behavior at intersections were involved in more frequent and more severe conflicts than were moped riders who did not engage in violation behavior. Typical moped violation behavior included running red lights, riding in improper directions, waiting at improper positions, riding in improper lanes, and overloading. Violation behavior was closely associated with the traffic environment (traffic facilities, traffic flow, traffic signal status, and other riders' behavior), but not with either the vehicle's characteristics or the rider's characteristics. This difference suggests that countermeasures related to the traffic environment would be more effective than those related to either vehicle or rider characteristics. Countermeasures within the areas of traffic regulation, traffic management, traffic facilities, vehicle management, and rider education are proposed.

show abstract

“…Cao and Sano [20] proposed a motorcycle equivalent (ME) to translate mixed traffic conditions in Hanoi, Vietnam, into a unified motorcycle flow. A mixed flow of bicycles and mopeds was normalised in bicycle equivalent (BE) units by Chen et al [21]. It was found that mopeds have a BE value larger than one under high-density conditions and a BE value smaller than one under low-density conditions.…”

Section: Related Workmentioning

confidence: 99%

The Influence of Jam Density and Merging Cyclists on the Queue Discharge Rate

Wierbos

Knoop

Goñi-Ros

et al. 2020

Journal of Advanced Transportation

View full text Add to dashboard Cite

An increasing number of people use the bicycle for urban trips resulting in local congestion at intersections, especially during peak hours. Understanding the queue dynamics is key to find the correct measures that can reduce the delays for cyclists without affecting other traffic modes. To this end, the discharge process of bicycle queues is studied, focusing on the impact of jam density on the queue discharge rate and how this process is affected by cyclists that merge into the queue during the discharge phase. The impact of merging cyclists is captured by a newly introduced bicycle equivalent (BE) value. This direction-specific BE value is used to convert a merging cyclist into a cyclist that is waiting in the original queue. Results show that the queue discharge rate increases with increasing density of the queue. Furthermore, cyclists that merge by overtaking contribute to the queue discharge rate, while cyclists who merge from a perpendicular direction hinder the discharge process, thereby decreasing the bicycle flow at the intersection. The insights can be used to develop measures which minimise delay at intersections and to design efficient infrastructure for bicyclists.

show abstract

Normalized Volume Measurement for Nonmotorized Traffic Flow Mixed with Mopeds

Cited by 9 publications

References 3 publications

Developing Bicycle Equivalents for Mopeds in Shanghai, China

Developing Bicycle Equivalents for Mopeds in Shanghai, China

Moped Rider Violation Behavior and Moped Safety at Intersections in China

The Influence of Jam Density and Merging Cyclists on the Queue Discharge Rate

Contact Info

Product

Resources

About