Research Article
Before-and-After Field Investigation of the Effects on Pollutant Emissions of Replacing a Signal-Controlled Road Intersection with a Roundabout
Table 3
Roundabout characteristics [
4].
| | General characteristics | Approach characteristics | | | | | Approach | | | | | North | East | South | West |
| | Inscribed circle diameter [m] | 36 | Entering lanes [#] | 2 | 1 | 2 | 1 | | Central island diameter [m] | 20 | Exiting lanes [#] | 1 | 1 | 1 | 1 | | Circulatory roadway width [m] | 8 | Splitter island width [m] | 4.50 | 3.80 | 4.20 | 4.20 | | Lanes in circulatory roadway [#] | 1 | Entry width [m] | 7.25 | 4.50 | 7.25 | 3.75 |
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