The follow-up time issue on small roundabouts
The follow-up time was investigated. The aim of this analysis was to create a formula that allows the follow-up time calculated using the most important external parameters. The studies were based on empirical data collected at small roundabouts localized on Upper Silesia. The follow-up time is the...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Silesian University of Technology
2008-01-01
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| Series: | Transport Problems |
| Subjects: | |
| Online Access: | http://transportproblems.polsl.pl/pl/Archiwum/2008/zeszyt3/2008t3z3_04.pdf |
| Summary: | The follow-up time was investigated. The aim of this analysis was to create a formula that allows the follow-up time calculated using the most important external parameters. The studies were based on empirical data collected at small roundabouts localized on Upper Silesia. The follow-up time is the average time gap between two cars of the minor stream being queued and entered the same major stream gap one behind the other. Follow-up times were measured directly by observing traffic flow. Resulting follow-up times were analyzed to determine their dependence on parameters such as intersection layout, roundabouts diameter and left visibility. These parameters were tested using the conventional calculation method (regression analysis). The dependence of follow-up time was then integrated into the own capacity estimation method for small roundabouts localized on urban areas. One of the biggest advantages this dependence is that capacity and traffic flow on small roundabouts can be determined reliably and appropriately for actual situations. The new follow-up time values for all range of external diameters of small roundabout 26 (22) – 40 m have been presented in this article. |
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| ISSN: | 1896-0596 |