A surrogate safety analysis to evaluate the impact of circulatory pavement markings in two-lane roundabouts
| dc.contributor.advisor | Hildebrand, Eric D. | |
| dc.contributor.author | Taweel, Riley J. | |
| dc.date.accessioned | 2023-10-17T13:31:09Z | |
| dc.date.available | 2023-10-17T13:31:09Z | |
| dc.date.issued | 2022-12 | |
| dc.description.abstract | This study involved a safety evaluation of multiple pavement markings schemes at the two-lane roundabout at the intersection of Smythe Street and Route 8 in Fredericton, New Brunswick using both automated and manual surrogate safety analyses. Several competing theories exist regarding which is the best practices for the use of circulatory lane pavement markings in two-lane roundabouts with two-lane entrances and exits. Some suggest that having no pavement markings fosters a safer environment for drivers, while others promote the use of circulatory pavement markings of various patterns as preferred options. The pavement marking schemes studied in this project were: no circulatory pavement markings installed (baseline case), circulatory pavement markings installed in accordance with the TAC MUTCD-C guidelines (Scenario 1), and an alternative circulatory lane pavement marking scheme with bolder lines (Scenario 2). In Scenario 1 and Scenario 2, traffic conflicts were observed at lower rates than in the base cases, however, the severity of the observed traffic conflicts remained approximately the same. Off-tracking events, in which vehicles failed to maintain their lane position while circulating the roundabout, were found to be reduced by 24.3% in Scenario 1, and 19.2% in Scenario 2. These findings support that circulatory lane pavement markings in two-lane roundabouts contributed to an environment with improved safety performance compared to the facility with no circulatory markings installed. Further research is required to confidently discern whether Scenario 1 or Scenario 2 provides the best safety performance. | |
| dc.description.copyright | © Riley J. Taweel, 2022 | |
| dc.format.extent | xi, 122 | |
| dc.format.medium | electronic | |
| dc.identifier.uri | https://unbscholar.lib.unb.ca/handle/1882/37485 | |
| dc.language.iso | en | |
| dc.publisher | University of New Brunswick | |
| dc.relation | Natural Sciences and Engineering Research Council | |
| dc.relation | Albert & Ena Summer Fellowship Program | |
| dc.rights | http://purl.org/coar/access_right/c_abf2 | |
| dc.subject.discipline | Civil Engineering | |
| dc.title | A surrogate safety analysis to evaluate the impact of circulatory pavement markings in two-lane roundabouts | |
| dc.type | master thesis | |
| oaire.license.condition | other | |
| thesis.degree.discipline | Civil Engineering | |
| thesis.degree.grantor | University of New Brunswick | |
| thesis.degree.level | masters | |
| thesis.degree.name | M.Sc.E. |