Minor Road Traffic Delays at Priority Junctions on Low Speed Roads in Suburban Areas

2014 ◽  
Vol 70 (4) ◽  
Author(s):  
Mohammad Ali Sahraei ◽  
Othman Che Puan ◽  
M. Al–Muz–zammil Yasin
Keyword(s):  
Time Delays ◽  
Road Traffic ◽  
Video Recording ◽  
Operational Performance ◽  
Road Vehicles ◽  
Recording Technique ◽  
Suburban Areas ◽  
Minor Road ◽  
Traffic Delays ◽  
Traffic Delay

Traffic delay is one of the important aspects considered in the assessment of the operational performance of intersections. In the analysis of priority or unsignalised junctions, delays to minor road vehicles are often estimated using the existing mathematical models. However, the applicability of such a model depends on the basis and the source of the data with which the model was calibrated. This study was carried out to evaluate traffic delays to minor road vehicles at priority junctions in suburban areas. The data were collected at two priority junctions using video recording technique. The results showed that the day time delays were longer than of those observed during the twilight time. In both situations, delay to minor road vehicles increases as the volume of major road traffic increases. However, the effect of conflicting volume on the delay to the minor road vehicles is not clear. The comparisons between observed delay and the values predicted using the HCM and Tanner’s models indicated that, in general, the observed delays are much lower than the values predicted by both models particularly during the day time. Such a finding suggests that both HCM and Tanner’s models are not directly applicable to the analysis of delays at priority junctions in Malaysia.

Gap-acceptance in road traffic

1968 ◽  
Vol 5 (1) ◽  
pp. 84-92 ◽  
Author(s):  
A. G. Hawkes
Keyword(s):  
Simple Model ◽  
Service Time ◽  
Time Distribution ◽  
Road Traffic ◽  
Service Time Distribution ◽  
Major Road ◽  
Gap Acceptance ◽  
Road Vehicles ◽  
Minor Road ◽  
Acceptance Function

We find the distribution of delay to minor road vehicles waiting to merge or cross a single stream of major road traffic. The decision to cross is taken on the basis of a gap-acceptance function. The model turns out to be a simple queueing problem in which a customer finding an empty queue has a different service time distribution from queueing customers. The key to this representation is given in Section 3. Some numerical results in Section 6 indicate that in most circumstances a simple model will give adequate results.

MIDBLOCK U–TURN FACILITIES ON MULTILANE DIVIDED HIGHWAYS: AN ASSESSMENT OF DRIVER’S MERGING GAP AND STOP DELAYS

2015 ◽  
Vol 76 (14) ◽  
Author(s):  
Othman Che Puan ◽  
Che Ros Ismail ◽  
Mohd Rosli Hainin ◽  
Anil Minhans ◽  
Nur Syahriza Muhamad Nor
Keyword(s):  
Road Traffic ◽  
Video Recording ◽  
Primary Objective ◽  
Major Road ◽  
Highway Capacity ◽  
Highway Capacity Manual ◽  
Critical Gap ◽  
Planning And Design ◽  
Traffic Delays ◽  
Traffic Volumes

This paper discusses the results of a study which was carried out with a primary objective to evaluate the merging gaps and traffic delays at midblock U–turn facilities installed on multilane divided highways. A total of more than 2,000 U–turn drivers at a midblock U–turn facility on an urban multilane highway were observed using a camera–video recording technique. The data pertaining to the analysis of gap acceptance and rejection was abstracted from the video–playbacks using a computer event recording program. The analysis found that the critical gap of the drivers at a midblock U–turn facility is in the range of 4.0 – 4.5 seconds, which is different from the values reported for studies carried out in other countries. The effect of major road traffic volumes on the stop delays to the U–turn drivers could not be established because the data did not exhibit any specific trend. The drivers were observed to make forced merging maneuvers when traffic volumes in the main traffic stream are relatively heavy. Such maneuvers lead to flow breakdown in the major road to occur at a faster rate. The findings suggest that there is a need for a thorough study to be carried out to evaluate the current practice of U–turn facility design and assessment methods since traffic operations at such a facility is different from those at on–ramp facilities where their planning and design are generally based on the American Highway Capacity Manual. 

Evaluation of a New Intersection Design, “Shifting Movements”

2021 ◽  
pp. 036119812110159
Author(s):  
Ma’en Mohammad Ali Al-Omari ◽  
Mohamed Abdel-Aty
Keyword(s):  
Road Traffic ◽  
Operational Performance ◽  
Microscopic Simulation ◽  
Left Turn ◽  
Traffic Conditions ◽  
Minor Road ◽  
Traffic Volumes ◽  
Average Control ◽  
Traffic Operation ◽  
Intersection Design

Several unconventional designs have been suggested to enhance traffic operation and safety at intersections. However, the operational benefits of implementing some of them are achieved only under certain traffic conditions. For instance, the operational performance of the restricted crossing U-turn (RCUT) intersection design manifests only under highly unbalanced traffic conditions. The RCUT intersection outperforms conventional intersections that are subjected to high major traffic and light minor traffic volumes, while its operational performance fades at intersections with moderate to heavy minor road traffic. In this technical paper, a new innovative four-leg intersection design has been proposed to replace the RCUT intersection under moderate and heavy minor road traffic volumes. The new intersection design which has been named the “Shifting Movements” (SM) intersection has a low number of conflict-points compared with conventional intersections, but similar to the RCUT intersection. Therefore, similar safety benefits are expected to be achieved by the implementation of the SM intersection. Operational evaluations and comparisons between conventional, RCUT, and SM intersections have been conducted in the microscopic simulation environment. Different traffic volume levels and left-turn proportions have been assumed to represent the peak hour with moderate to high left-turn traffic. The results indicate that the SM intersection design significantly outperforms conventional and RCUT intersections that are subjected to high traffic volumes in average control delay and throughput.

Gap-acceptance in road traffic

1968 ◽  
Vol 5 (01) ◽  
pp. 84-92 ◽  
Author(s):  
A. G. Hawkes
Keyword(s):  
Simple Model ◽  
Service Time ◽  
Time Distribution ◽  
Road Traffic ◽  
Service Time Distribution ◽  
Major Road ◽  
Gap Acceptance ◽  
Road Vehicles ◽  
Minor Road ◽  
Acceptance Function

We find the distribution of delay to minor road vehicles waiting to merge or cross a single stream of major road traffic. The decision to cross is taken on the basis of a gap-acceptance function. The model turns out to be a simple queueing problem in which a customer finding an empty queue has a different service time distribution from queueing customers. The key to this representation is given in Section 3. Some numerical results in Section 6 indicate that in most circumstances a simple model will give adequate results.

scholarly journals Injury surveillance in elite field hockey: a pilot study of three different recording techniques

2020 ◽  
Vol 6 (1) ◽  
pp. e000908
Author(s):  
Anna Levi ◽  
Till-Martin Theilen ◽  
Udo Rolle
Keyword(s):  
Pilot Study ◽  
Video Recording ◽  
Injury Rate ◽  
Assessment Model ◽  
Lower Limbs ◽  
Injury Incidence ◽  
Field Hockey ◽  
Recording Technique ◽  
Injury Data ◽  
Recording Techniques

ObjectiveIn field hockey, injuries are assessed by various recording techniques leading to a heterogenic collection of poorly comparable injury data.MethodsInjury data were prospectively collected at the 2016 Men’s Hockey Junior World Cup using the match injury reports (MIRs), video injury clips provided by the Fédération Internationale de Hockey, and daily medical reports (DMRs). A pilot study comparing injury type, mechanism, location on the field, injured body part and overall injury incidence among the different injury recording techniques was performed.ResultsMIRs and video injury clips were completely available for analysis. DMRs were returned from 11 out of 16 teams (69%). In total, MIRs yielded 28, video analysis 36, and DMRs 56 injuries. Overall injury rate varied between 24.8 and 57.9 injuries per 1000 player match hours. The majority of injuries affected the lower limbs by all three methods (41.7–61.2%) and were mainly caused by having been hit by the ball (20.4–50%) or stick (11.1–28.6%). Reports of concussions during competition were incoherent between MIR (2 cases) and DMR (no cases). The DMR was the only method to record overuse injuries (16.1%), injuries in training (12.5%), and time-loss injuries of one or two days (12.5%) or of three or more days (14.3%).ConclusionInjury data vary substantially between the MIR, DMR and injury video recording technique. Each recording technique revealed specific strengths and limitations. To further advance injury research in field hockey, the strengths of each recording technique should be brought together for a synergistic injury assessment model.

Research on Traffic Delay Predicting at Signalized Intersection Based on Neural Network

2013 ◽  
Vol 427-429 ◽  
pp. 901-904 ◽  
Author(s):  
Chang Jiang Zheng ◽  
De Gang Lin ◽  
Shu Kang Zheng ◽  
Shu Yan Chen
Keyword(s):  
Neural Network ◽  
Network Model ◽  
Bp Neural Network ◽  
Prediction Models ◽  
Signalized Intersection ◽  
Actual Data ◽  
Traffic Delays ◽  
Traffic Delay ◽  
Strong Ability

Available traffic delays prediction models for signalized intersection tend to predict the traffic delays under certain conditions and they are weak in adapt to different situation. In the paper, based on the theories of BP neural network, a network model, having a strong ability to adapt to different conditions, for traffic delay in average hours at a signalized intersection is established. It is trained and tested utilizing the data of traffic delay in average hours at a certain entrance of a signalized intersection. The predicted results and the actual data are compared with each other and the results prove the reliability and effectiveness of BP neural network in predicting traffic delays.

Assessment of Head Tilt in Young Children with Unilateral Posterior Crossbite by Video Recording

2007 ◽  
Vol 32 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Débora Bevilaqua-Grossi ◽  
Thaís Cristina Chaves ◽  
Margarete Lovato ◽  
Anamaria Siriani de Oliveira ◽  
Simone Cecílio Hallak Regalo
Keyword(s):  
Young Children ◽  
Video Recording ◽  
Head Tilt ◽  
Body Posture ◽  
Class I ◽  
Occlusion Body ◽  
Posture Analysis ◽  
Recording Technique ◽  
Posterior Crossbite

14 children with unilateral posterior crossbites (PCB) participated in this study and 14 children with Angle's class I occlusion. Body posture analysis was made by a video recording technique. The results showed greater tilt in the angles of head tilt in PCB children when compared to neutral occlusion children. We also observed that head tilt followed the side of crossbite. Such results suggest that unilateral PCB could be related to the development of head tilt on the same side of the crossbite.

scholarly journals Road traffic delays and musculoskeletal health complaints among full-time bank employees: A cross-sectional study in Dhaka city

2019 ◽  
Author(s):  
Mohammad Ali ◽  
Gias U. Ahsan ◽  
Zakir Uddin ◽  
Ahmed Hossain
Keyword(s):  
Back Pain ◽  
Road Traffic ◽  
Health Complaints ◽  
Full Time ◽  
Dhaka City ◽  
Musculoskeletal Health ◽  
Related Factors ◽  
Traffic Delays ◽  
Bank Employees ◽  
The One

AbstractBackgroundThe factors of road traffic delays (RTDs) have significant consequences for both commuters’ health and the country’s economy as a whole. Addressing the musculoskeletal health complaints (MHCs) among full-time employees has not been fully explored. The current study investigates the association between RTDs-related factors and MHCs among bank employees.MethodsWe conducted a cross-sectional study among full-time employees from 32 banks in Dhaka city. Descriptive statistics summarized the gaps in the socio-demographic and RTDs-related factors on the one-month prevalence of MHCs. Random intercept logistic regression models were used to identify the associate factors of the MHCs.ResultsOut of 628 full-time bank employees, the one-month prevalence of MHCs was 57.7%. The MHCs are more prevalent among adults of age group 40-60 years (68%) than the age group 20-40 years (54%). The one-month prevalence of lower back pain (LBP) was highest (36.6%), followed by neck pain (22.9%) and upper back pain (21.2%). Multilevel logistic regression analysis of employees showed that the odds of MHCs were lower among male employees (AOR=0.42, 95% CI= 0.27, 0.64), car commuters (AOR = 0.38, 95% CI=0.19-0.76, reference: bus commuters) and rickshaw commuters (AOR=. = 0.39, 95% CI=0.22-0.69, reference: bus commuters). The MHCs were significantly higher among employees with following factors: obesity (AOR= 1.50, 95% CI= 1.02-2.21), prolonged commute time to the office (AOR = 7.48, 95% CI =3.64-15.38) and working extended-time in a day (AOR= 1.50, 95% CI= 1.02-2.21).ConclusionsThe study indicates a high burden of musculoskeletal health complaints among the employees in Dhaka city, and the most prevalent complaint was low back pain. Our study suggests that factors related to road traffic delays might act synergistically on developing musculoskeletal problems in full-time employees.

scholarly journals VIDEO RECORDER IS A SOURCE OF CRIMINALLY SIGNIFICANT INFORMATION IN INVESTIGATING CRIMES RELATED TO VIOLATIONS OF ROAD TRAFFIC AND VEHICLE OPERATION IN THE PASSENGER TRAFFIC SPHERE

2020 ◽  
Vol 6 (4) ◽  
pp. 146-152
Author(s):  
M. V. Syretsky
Keyword(s):  
Road Traffic ◽  
Video Recording ◽  
Video Stream ◽  
Streaming Data ◽  
Significant Information ◽  
Passenger Traffic ◽  
Passenger Transportation ◽  
Vehicle Operation ◽  
Video Recorder ◽  
Technical Features

The article touches upon the issues of the influence of negative factors on the inspection of the scene of a traffic accident in the investigation of crimes related to violations of traffic rules and the operation of vehicles in the field of passenger transportation. Attention is drawn to the fact that video recording is one of the resources of forensically significant information about an accident that has occurred, one of the sources of which are video recorders. The tasks to be solved when examining data from recorders are determined. The classification of devices is given depending on the type of vehicles equipped with them. The issues of detection, seizure and use of information from video recorders are considered. The technical features and capabilities of DVRs are analyzed, which are directly related to the analysis of information about the event. The specifics of the process of recording streaming data (RAW video stream) on the device at the time of the emergency shutdown of the recorder as a result of an accident, as well as the peculiarities of ensuring the safety of information and its withdrawal are touched upon. The types and possibilities of forensic examinations are indicated, the object of research of which can subsequently be a recording from a video recorder. The question is raised about the need for an explanatory work by the investigator with the participants and eyewitnesses of the accident in order to prevent the irrevocable loss of information about the accident contained on their devices.

scholarly journals Factors Influencing Road Traffic Delay: Drivers’ Perspectives And Loss Of Man-Hour Along Lagos-Abeokuta Expressway, Lagos, Nigeria

1970 ◽  
Vol 10 (5) ◽  
pp. 618-628
Author(s):  
A.I. Bako ◽  
O.O. Agunloye
Keyword(s):  
Road Traffic ◽  
Secondary Data ◽  
Sampling Technique ◽  
Likert Scale ◽  
Traffic Volume ◽  
Primary Data ◽  
The Road ◽  
Factors Influencing ◽  
Traffic Delay ◽  
Bus Stops

This study examined drivers’ perception of road traffic delay attributes and factors influencing road traffic delay with a view to assessing loss of man hours along Lagos-Abeokuta Expressway. This view translated to policy statements that can tremendously reduce the road traffic delay in the study area. Primary data were collected through questionnaire administration, traffic volume survey and direct field observation while the secondary data were obtained from past relevant journals, textbooks among others. The sample frame evolved from an average of 3 day traffic volume survey, which translated into 17,647 drivers between 7 am – 7 pm in the study area. The sample size was 117 (0.007%) as the purposive sampling technique was adopted. The frequency tables and likert scale outputs were adopted for data analyses.  The study found that most drivers along this road were majorly (75.2%) young educated working adults while the trips made accounted for the concentration of work and after-work trips along this road. The study revealed that traffic delay along the road was largely due to indiscreet use of bus-stops, bad roads condition, drivers’ recklessness with DAI values of 4.70, 3.77 and 3.41 respectively using a 5 Point Likert Scale. This study established that a total of 2,920 ‘man-hours’ was lost annually on this road as the daily accumulated estimate for man hour loss was estimated as 8 hours per day. The strict enforcement and monitoring of proper usage of bus-stops and prompt rehabilitation of bad roads are needed among other recommendations.Key Words: Road Traffic Delay, Drivers’ Perspectives, Man-Hour Loss

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