Assessing Safety Benefits of Variable Speed Limits

Lee, Chris; Hellinga, Bruce; Saccomanno, Frank

doi:10.3141/1897-24

Cited by 76 publications

(60 citation statements)

References 11 publications

(13 reference statements)

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“…Studies by Allaby et al (2007) and Lee et al (2004) showed that safety was improved at the expense of increase in travel time, However studies by Habtemichael and Picado-Santos (2013) and Islam et al (2013) showed improvements in mobility as well as safety after implementation of VSL.…”

Section: Discussionmentioning

confidence: 99%

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Towards a Safe and Efficient Motorway System: Literature Review on Variable Speed Limits

Li¹,

Ranjitkar²,

Rashidi³

2017

dtetr

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Variable speed limits (VSL) is an emerging ITS tool, which can help to improve safety and efficiency of motorway systems through a better harmonization of traffic flow. It can reduce variation in speed of vehicles travelling along the controlled section. The implementation of VSL encourages a uniform driving behaviour and thus resulting in a better distribution of traffic over the motorway network, and better utilization of the road infrastructure. The primary objective of motorway traffic management is to improve mobility benefits of motorways under acceptable safety standards; this is also the main purpose of applying VSL. This paper reviews the existing VSL methods from view points of safety and mobility gains or losses due to VSL on motorway systems. A systematic review of the literature of empirical as well as simulation-based studies is presented.

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Section: Discussionmentioning

confidence: 99%

“…Impacts of VSL on Safety Lee et al (2004) employed a real-time crash prediction model integrated with a PARAMICS micro-simulator to evaluate a speed-based VSL algorithm. They concluded that total crash potential was reduced at the expense of increase in total travel time.…”

Section: Simulation Based Studies On Vslmentioning

confidence: 99%

Towards a Safe and Efficient Motorway System: Literature Review on Variable Speed Limits

Li¹,

Ranjitkar²,

Rashidi³

2017

dtetr

View full text Add to dashboard Cite

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“…) was modified in 2003 [15], and then in 2004 [16] by the author and implemented in the simulation of a smaller transport network, 2.5 km long, which contains four inductive loops, three variable message signs and three traffic lanes. As a conclusion of the said simulation, the obtained results show that the average crash potential is reduced by approximately 25% by using the system of variable traffic signs and the crash prevention model.…”

Section: Overview Of Previous Researchmentioning

confidence: 99%

“…The models [16,18,20] and research [5,6,14] were made on the so called urban motorways which have from 6 to 12 traffic lanes on average. In the same way, the existing models of accident occurrence prevention are adjusted to technical characteristics of such roads so the traffic volume change on the particular lane was taken into consideration as an important factor, as well as lane change frequency, area of the ramp for merging and exclusion, sections with increase or decrease of number of lanes etc.…”

Section: Overview Of Previous Researchmentioning

confidence: 99%

Real-time traffic safety management model on motorways

Huzjan¹,

Mandžuka

Kos

2017

Teh. vjesn.

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Original scientific paper The methodology that allows predicting the occurrence of traffic accidents on the motorway was studied and defined in this paper. On the basis of this assessment the implementation of active measures for reducing the probability of their actual occurrence is included. The intensity of traffic does not give a simple correlation with the number and the type of accidents, that relationship is more complex. Previous studies have been applied to motorways with six and more traffic lanes, and no studies have been carried out for four-lane motorways (with the driving and overtaking lane on one carriageway). This paper presents a new model for such motorways, the model is based on measuring values of parameters of traffic flow and external factors that affect the traffic flow. The degree of crash potential was brought to correlation with the existing statistical data on traffic accidents on the test section and traffic flow data. This model is important for experts to produce algorithms that manage variable message signs on highways. Keywords: crash potential factor; four-lane motorways; traffic flow; traffic safety management model; variable message signs Model stvarno-vremenskog upravljanja sigurnošću prometa na autocestamaIzvorni znanstveni članka U radu je istražena i definirana metodologija koja omogućuje predviđanje nastanka prometnih nesreća na autocesti. Na osnovu te procjene uključuje se provedba aktivnih mjera za smanjenje vjerojatnosti njihova stvarnog nastanka. Sam intenzitet prometa ne daje jednostavnu korelacijsku vezu s brojem i vrstom prometnih nesreća već je taj odnos mnogo složeniji. Dosadašnja istraživanja primjenjivana su za autoceste sa šest i više prometnih traka, odnosno nema istraživanja napravljenih za četverotračne autoceste. U radu je prikazan novi model za takve autoceste, a baziran je na mjerenju vrijednosti parametara prometnog toka te vanjskih čimbenika koji utječu na odvijanje prometnog toka. Stupanj opasnosti od nastanka nesreće doveden je u korelaciju s postojećim statističkim podacima o prometnim nesrećama na testnoj dionici i podataka o prometnom toku. Ovaj model značajan je za eksperte koji izrađuju algoritme koji upravljaju promjenjivim prometnim znakovima na autocestama.Ključne riječi: četverotračne autoceste; faktor opasnosti nastanka prometne nezgode; model upravljanja sigurnošću prometa; prometni tok; promjenljiva svjetlosna signalizacija

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“…Borrough [5] and Lee et al [6] also reported possible decrease in the number of crashes as a result of applying VMS. Other researchers reported positive effect of VMS on reducing travel time, alleviating congestion and improving system performance [7,8,9].…”

Section: Introductionmentioning

confidence: 99%