Relationship of Lane Width to Safety on Urban and Suburban Arterials

Potts, Ingrid B; Harwood, D W; Richard, Karen R

doi:10.3141/2023-08

Cited by 60 publications

(38 citation statements)

References 2 publications

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“…The crash modification factors involve the lane width, shoulder width, shoulder type, horizontal curves, grades, road density, two-way leftturn lanes, passing lanes, roadside design for highways and deviation angle, traffic control, individual left-and rightturn lanes, sight distance, and straight line for intersections. Potts et al [13] investigated the relationship between lane width and road safety. Their results indicate that reducing the lane width of urban and suburban road below 3.65 m increased crash frequency.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Road Shoulder and Weather Conditions on the Occurrence of Rollover Crashes in Two-lane Highways

Kordani¹,

Shirini²,

Yazdani³

2019

Period. Polytech. Civil Eng.

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Rollover crash is a type of dangerous crash that occurs often in two-lane highways. Therefore, this study evaluates the effect of road shoulder and weather condition on rollover crashes. Crash data show that 8,609 crashes were recorded from 2006 to 2009 on six two-lane highways located at the center of Iran. This data contains 1860 rollover crashes. Rollover crash in this paper not included the head on crashes and fixed object crashes. Therefore the rollover crashes are only single vehicle crashes. Binary logit was selected for modelling since there were two possible outcomes: rollover crashes and other crash types. The variables of the final model include highway class, road shoulder width, as well as rainy, snowy, foggy and night conditions. The modeling results show that rainy and foggy variables, with coefficients of 0.731 and 0.719 respectively, had the greatest effects on rollover crash occurrence. Also, road shoulder width and night conditions, with coefficients of 0.221 and 0.184 respectively, had the least effects on rollover crash occurrence. Afterward, sensitivity analysis was performed on all the independent variables, and the results show variable variation and indicate that the probability of rollover crash occurrence is 21.29 % on the mentioned highway.

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Section: Introductionmentioning

confidence: 99%

The Effect of Road Shoulder and Weather Conditions on the Occurrence of Rollover Crashes in Two-lane Highways

Kordani¹,

Shirini²,

Yazdani³

2019

Period. Polytech. Civil Eng.

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“…In other words, when speed distribution was high, the examined vehicles tended to change lanes frequently due to the difference in speeds between vehicles. Some previous studies have found speed variations to be positively related to crashes [44,45,47,68].…”

Section: Effect Of Desired Speed Distribution On Lane Change Frequencymentioning

confidence: 92%

“…A free lane change considers a lane change of a vehicle to obtain speed advantages or more space [43]. Some previous studies have focused on the relationship between speed variations and crash rates or crash risk [19,31,[44][45][46][47], while other studies have examined the number of lane changes under different traffic flow parameters to analyze the capacity of multilane roads [39,[48][49][50]. However, these studies lacked research specifically regarding the identification and quantification of significant traffic parameters that affect lane changing using real data by considering lane changing as one of the essential subjects of sustainable traffic safety.…”

Section: Introductionmentioning

confidence: 99%

Simulation-Based Analysis of the Effect of Significant Traffic Parameters on Lane Changing for Driving Logic “Cautious” on a Freeway

Farooq

Juhász

2019

Sustainability

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Lane changing of traffic flow is a complicated and significsant behavior for traffic safety on the road. Frequent lane changing can cause serious traffic safety issues, particularly on a two-lane road section of a freeway. This study aimed to analyze the effect of significant traffic parameters for traffic safety on lane change frequency using the studied calibrated values for driving logic “conscious” in VISSIM. Video-recorded traffic data were utilized to calibrate the model under specified traffic conditions, and the relationship between observed variables were estimated using simulation plots. The results revealed that changes in average desired speed and traffic volume had a positive relationship with lane change frequency. In addition, lane change frequency was observed to be higher when the speed distribution was set large. 3D surface plots were also developed to show the integrated effect of specified traffic parameters on lane change frequency. Results showed that high average desired speed and large desired speed distribution coupled with high traffic volume increased the lane change frequency tremendously. The study also attempted to develop a regression model to quantify the effect of the observed parameters on lane change frequency. The regression model results showed that desired speed distribution had the highest effect on lane change frequency compared to other traffic parameters. The findings of the current study highlight the most significant traffic parameters that influence the lane change frequency.

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“…Similarly, motorcycle accidents increase as a result of increasing traffic volume (Radin et al, 2000). Concerning lane widths, studies have reported that roadways with narrower lanes resulted in more crash incidents (Harwood et al, 2000;Potts et al, 2007;Zegeer et al, 1988). In addition, Heimbach et al (1983) showed that collisions increase as lane widths decrease but the relationship is not linear.…”

Section: Effects Of Vehicle Speed Traffic Volume and Lane Width On Cmentioning

confidence: 96%

Effects of traffic and road factors on motorcycling safety perception

Salehi

Hamid

Arintono

et al. 2013

Proceedings of the Institution of Civil Engineers - Transport

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In Malaysia and other developing Asian countries, the over-representation of the motorcycle population in mixed traffic results in a high number of motorcyclist casualties and fatalities. As a result, by providing a safer environment for motorcycling, the key problem of road accidents would be minimised. Therefore, this study aims to examine the effects of vehicle speed, traffic volume and lane width on mixed traffic conditions. Each of the 60 motorcyclists who took part in this study watched 12 video clips and saw six photographs of road scenes recorded from a number of sites, and rated their perceived safety related to the three variables. This study found that the perceived safety of motorcycling is associated with these three factors (p < 0 . 01) and motorcycling safety would decrease under higher vehicle speed, heavier traffic volume and narrower lane width. Segregating motorcycles from mixed traffic is one engineering option to address motorcycling safety.

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Relationship of Lane Width to Safety on Urban and Suburban Arterials

Cited by 60 publications

References 2 publications

The Effect of Road Shoulder and Weather Conditions on the Occurrence of Rollover Crashes in Two-lane Highways

The Effect of Road Shoulder and Weather Conditions on the Occurrence of Rollover Crashes in Two-lane Highways

Simulation-Based Analysis of the Effect of Significant Traffic Parameters on Lane Changing for Driving Logic “Cautious” on a Freeway

Effects of traffic and road factors on motorcycling safety perception

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