Position Papers
Marius de Langen, Theo Rwebangira, Enoch Kitandu and Stephen Mburu
UNESCO-IHE, (the Netherlands), University of Dar es Salaam (Tanzania), Nairobi City Council (Kenya)
Published in
Submitted by
Peter Midgley, gTKP
Related theme(s)
Urban Mobility
Africa (AFR)

Urban road design in Africa: the role of traffic calming facilities

In Dar es Salaam and Morogoro, Tanzania, a range of traffic calming interventions were implemented in 1996-99. Their immediate effects have been reported earlier. This paper summarises an evaluation of their long-term impact, with the aim to increase understanding of the performance of various traffic calming facilities in African road and traffic conditions, in particular: their lasting impact on traffic safety and efficiency, and their maintenance requirements.

The most important finding is the great effectiveness of the raised zebra crossing. This facility has a very positive permanent effect on the traffic flow, has low maintenance requirements (if well designed and constructed) and, combined with other measures (a/o the systematic use of minibus bays/platforms) can play an important role in increasing the efficiency of informal public transport. The long-term impact of a range of other interventions is also documented in the paper.