Fixed Time v Single Stream MOVA Control on a signalled roundabout

Abstract

In this case study of the Hobby Horse roundabout in Leicester a comparison, in terms of average delay during AM and PM peaks, is made between full roundabout coordination using Fixed-Time, and adaptive control using single stream MOVA. Microsimulation software (VISSIM) is used as the platform for this comparison whilst LinSig and PCMOVA have been used to configure Fixed-Time and MOVA control, respectively. In this case the microsimulation reveals that Fixed-Time is more effective than single stream MOVA at reducing delays. It is suggested that the increased benefits provided by Fixed-Time originate from the greater proportion of green time available to the approaches than is possible using single stream MOVA. This in turn allows Fixed-Time to offer greater capacity and therefore reduce delays.