Two French Hard-Shoulder Running operations: Some comments on effectiveness and safety

Aron, Maurice; Cohen, Simon; Seidowsky, Régine

doi:10.1109/itsc.2010.5625159

Cited by 9 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, the estimated correlation coefficient between length and changes in serious crashes (actual number of serious crashes -expected number of serious crashes) is positive and statistically significant (r = 0.591, p = 0.004). These findings are consistent with previous studies on the safety effects of HSR [22,49,50]. The results are expected as an increase in freeway length increases exposure, which is a significant contributing factor to crash frequency.…”

Section: Discussionsupporting

confidence: 92%

“…The aim of this study is to evaluate the safety effect of HSR by applying the EB (empirical Bayes) methodology to crash data from South Korea collected before and after the HSR trials. More The authors' review of the literature suggests that the international evidence on HSR is mixed [9][10][11][12][18][19][20][22][23][24]. More importantly, conflicting results and views have yet to be reconciled [19,20,24].…”

Section: Objectives Of Studymentioning

confidence: 99%

See 1 more Smart Citation

Safety Effects of Freeway Hard Shoulder Running

et al. 2019

View full text Add to dashboard Cite

Hard shoulder running (HSR) has been increasingly used as a sustainable and viable way to increase road capacity. This study investigated the safety effect of HSR on freeways in South Korea using the empirical Bayes method. This study found an increase in the total number of crashes. In terms of crash severity, a higher proportion of crashes (25.3%) on 2(3)-lane sections were found to be serious (involving injuries and/or fatalities) compared to those on 4(5)-lane sections (3.6%). Also, a positive relationship was found between the length of the hard shoulder running and changes in crash frequencies. Thus, hard shoulder running on lengthy 2(3)-lane freeways should be avoided.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Objectives Of Studymentioning

confidence: 99%

Safety Effects of Freeway Hard Shoulder Running

et al. 2019

View full text Add to dashboard Cite

show abstract

“…HSR refers to the use of the roadway shoulder as a general-purpose lane only. The HSR strategy was found to increase the capacity in freeway sections that were often congested with limited capacity ( 21 – 24 ). A study on implemented HSR in Germany explored the safety and operational effects of HSR; the findings show that the capacity at the deployed roadway sections increased by 20–25% and the safety was not compromised ( 23 ).…”

Section: Literature Reviewmentioning

confidence: 99%

Operational and Safety Impact Analysis of Implementing Emergency Shoulder Use (ESU) for Hurricane Evacuation

Sharma¹,

Faruk²,

El-Urfali

2020

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

The emergency shoulder use (ESU) was implemented in Florida in September 2017 to facilitate mass evacuation before Hurricane Irma made landfall on the shores of Florida. ESU was implemented on the northbound I-75 for about 39 h and eastbound I-4 for about 6 h when the left shoulders were opened for use as travel lanes. This study discusses the operational and safety effects of ESU. The operational effects of ESU were studied and compared with other alternatives including one-way operation (contraflow) and both left and right shoulder use. The findings showed the left shoulder ESU could be an effective alternative to one-way operation. The one-way operation was not a preferred method as it can only be operated during the day time, requires massive resource allocation, and hampers emergency services reaching to different parts of the state. However, ESU on the left shoulder offers minimal disturbance to traffic and is easy to deploy. The safety impact analysis was performed by conducting a descriptive statistical comparison of crash types, severity, and other relevant factors during ESU operations. The crash analysis showed that the observed number of crashes on an urban I-75 segment during ESU operation is commensurate with normal operation with saturated traffic conditions, in contrast a rural segment experienced a higher observed crash rate than the predicted rate with saturated traffic conditions. The predictive analysis of ESU crashes also showed that ESU implementation helped to reduce the expected number of crashes significantly.

show abstract

“…hard Shoulder operation applications Ensuing from deteriorating traffic conditions and to promote traffic circulation during peak hours, temporary hard shoulder use has emerged as an aspiring ATM strategy, because recent implementations have resulted in a capacity increase on freeway sections that were often congested (27)(28)(29)(30)(31)(32). In Germany, Geistefeldt (29) analyzed the effects of temporary shoulder lane use on traffic and safety on highways, using a method developed in Brilon et al (33).…”

Section: Short-term Traffic Prediction Models and Datamentioning

confidence: 99%

Investigation of Lane Flow Distribution on Hard Shoulder Running Freeways

Sofia

Efthymiou

Antoniou

et al. 2013

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

In response to an impending demand growth at an existing reactive managed lane system and to provide a timely and more effective temporary hard shoulder activation, this paper presents the development of short-term prediction models. A lane-oriented attribute—namely, the left-lane flow distribution ratio—is introduced to ameliorate the system by capturing the forthcoming stream dynamics and reconfiguring it to be proactive. To assess the impact on the network's performance of implementing a system for hard shoulder running, an exploratory analysis was performed on the basis of data acquired by seven radar sensors located every 500 m along a Swiss freeway section that was not affected by incoming or exiting traffic. A locally weighted regression was employed to provide more accurate insight into traffic behavior by comparing observations derived during the regular operation of the system and a period in which it was suspended, with respect to seasonality patterns. To describe the impending stream motion by examining different time–volume clusters (off-peak and peak hours), two prediction models were specified according to the time range. The preliminary results of the study for several prediction horizons demonstrate an acceptable prediction uncertainty. The hard shoulder activation prediction confirms the analysis of the findings of this research with regard to the impact on operations.

show abstract

Two French Hard-Shoulder Running operations: Some comments on effectiveness and safety

Cited by 9 publications

References 10 publications

Safety Effects of Freeway Hard Shoulder Running

Safety Effects of Freeway Hard Shoulder Running

Operational and Safety Impact Analysis of Implementing Emergency Shoulder Use (ESU) for Hurricane Evacuation

Investigation of Lane Flow Distribution on Hard Shoulder Running Freeways

Contact Info

Product

Resources

About