Event-based road safety assessment : A novel approach towards risk microsimulation in roundabouts
(2020) In Measurement: Journal of the International Measurement Confederation 165.- Abstract
Conventional road accident risk is measured by the undesirable events/exposure ratio. Common exposure indicators are activity-based, so event-based exposure is needed to achieve event-based safety assessment. Furthermore, road safety simulation is a growing research field. The influence of some software parameters is still unknown. Besides, the use of simulation for exposure assessment is incipient. This paper aims to validate a preventive event-based risk indicator: traffic conflicts/encounters, extending to risk microsimulation by a novel procedure to identify encounters in VISSIM. We evaluated the safety of a roundabout by three independent methods: [i] Swedish Traffic Conflict Technique using T-Analyst tool, [ii] VISSIM/SSAM... (More)
Conventional road accident risk is measured by the undesirable events/exposure ratio. Common exposure indicators are activity-based, so event-based exposure is needed to achieve event-based safety assessment. Furthermore, road safety simulation is a growing research field. The influence of some software parameters is still unknown. Besides, the use of simulation for exposure assessment is incipient. This paper aims to validate a preventive event-based risk indicator: traffic conflicts/encounters, extending to risk microsimulation by a novel procedure to identify encounters in VISSIM. We evaluated the safety of a roundabout by three independent methods: [i] Swedish Traffic Conflict Technique using T-Analyst tool, [ii] VISSIM/SSAM conflict analysis, and, [iii] exposure mapping using encounters. Findings show that, once calibrated the safety distance factor of VISSIM conflict areas at 0.5, we got a similar number of observed and simulated conflicts, similar severities and similar number of encounters, resulting in similar observed and simulated risk outcomes.
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- author
- Bulla-Cruz, Lenin Alexander LU ; Laureshyn, Aliaksei LU and Lyons, Liliana
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Exposure, Risk, SSAM, Surrogate safety measures, Traffic conflicts, Traffic encounters, VISSIM
- in
- Measurement: Journal of the International Measurement Confederation
- volume
- 165
- article number
- 108192
- publisher
- Elsevier
- external identifiers
-
- scopus:85088030792
- ISSN
- 0263-2241
- DOI
- 10.1016/j.measurement.2020.108192
- language
- English
- LU publication?
- yes
- id
- 6e7a687e-28da-42e4-95dc-673b56062ad0
- date added to LUP
- 2020-07-27 12:34:50
- date last changed
- 2022-04-18 23:41:38
@article{6e7a687e-28da-42e4-95dc-673b56062ad0, abstract = {{<p>Conventional road accident risk is measured by the undesirable events/exposure ratio. Common exposure indicators are activity-based, so event-based exposure is needed to achieve event-based safety assessment. Furthermore, road safety simulation is a growing research field. The influence of some software parameters is still unknown. Besides, the use of simulation for exposure assessment is incipient. This paper aims to validate a preventive event-based risk indicator: traffic conflicts/encounters, extending to risk microsimulation by a novel procedure to identify encounters in VISSIM. We evaluated the safety of a roundabout by three independent methods: [i] Swedish Traffic Conflict Technique using T-Analyst tool, [ii] VISSIM/SSAM conflict analysis, and, [iii] exposure mapping using encounters. Findings show that, once calibrated the safety distance factor of VISSIM conflict areas at 0.5, we got a similar number of observed and simulated conflicts, similar severities and similar number of encounters, resulting in similar observed and simulated risk outcomes.</p>}}, author = {{Bulla-Cruz, Lenin Alexander and Laureshyn, Aliaksei and Lyons, Liliana}}, issn = {{0263-2241}}, keywords = {{Exposure; Risk; SSAM; Surrogate safety measures; Traffic conflicts; Traffic encounters; VISSIM}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Measurement: Journal of the International Measurement Confederation}}, title = {{Event-based road safety assessment : A novel approach towards risk microsimulation in roundabouts}}, url = {{http://dx.doi.org/10.1016/j.measurement.2020.108192}}, doi = {{10.1016/j.measurement.2020.108192}}, volume = {{165}}, year = {{2020}}, }