Cyclists in roundabouts—Different design solutions
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By Fernandes, P., Ferreira, E., Macedo, E., & Coelho, M. C.
Full Citation
Fernandes, P., Ferreira, E., Macedo, E., & Coelho, M. C. (2024). Unraveling roundabout dynamics: Analysis of driving behavior, vehicle performance, and exhaust emissions. Transportation Research Part D: Transport and Environment, 133, 104308.
Key Findings
This paper examined driving behavior, vehicle operational performance, and exhaust emissions data at a roundabout level. Various factors were evaluated including speed, acceleration, mass carbon dioxide and nitrogen oxide emissions by roundabout type (single-lane, compact two-lane, and multi-lane) and sub-segment (downstream, circulating area, and upstream). Results indicated that there were no statistically significant differences (p-value >0.05) in VSP modes, acceleration and vehicular jerk intervals, speeds, NOX, and NOX per kilometer between roundabout group types. Multi-lane roundabouts produced less CO2 (both in absolute values and per kilometer) than other types, but it yielded highly volatile (potentially dangerous) driving behaviors.