972 documents found.

Published: (SWOV) | Petegem, J.W.H. van; Uijtdewilligen, T.
Published: (SWOV) | Goldenbeld, Ch.; Stelling, A.; Kint, S.T. van der
Published: (SWOV) | Hettema, Z.J.A.; Dijkstra, A.; Schermers, G.
Published: (SWOV) | Bax, C.A.; Uijtdewilligen, T.; Kint, S.T. van der
Traffic congestion occurs when traffic demand exceeds road capacity, or when an incident such as a traffic crash, a vehicle breakdown occurs or temporary roadworks take place, all of which temporarily reduce capacity and restrict traffic flow. Congestion crashes mainly occur at the tail end of a traffic jam. There, the speed of the traffic flow decreases sharply, which coincides with frequent and…

Sustainable Road Safety implies that the traffic environment is designed to rule out serious crashes and to mitigate the severity of the crashes that do happen. The human dimension is the primary focus: man who is vulnerable, makes mistakes and does not abide by the rules.

A 30 km/h zone is also known as a ‘zone 30’ or a 'residential area'. The zone is mostly situated within an urban area and consists of connected access roads with a 30 km/h speed limit. The areas have a residential function where slow traffic and motorized traffic mix. For this reason speeds must be low (30 km/h maximum).

A safe infrastructure is of vital importance to pedestrians and cyclists. In 2010-2019, 40% of the number of road deaths were pedestrians or cyclists. In 2018, they even made up 69% of the number of seriously injured road users. If pedestrians or cyclists are involved in crashes with motorised vehicles driving faster than 30km/h, they run a significant risk of severe or fatal injuries.

The construction of the road network and the road design have a large effect on road safety: firstly, because these make certain conflicts impossible or unlikely (e.g. physical separation of driving direction, separate cycle lanes, obstacle-free verges); secondly, because these direct the desired traffic behaviour (recognizability, predictability).

About one third of the road deaths on Dutch roads occur at intersections. Within the urban area, this amounts to half and outside the urban area to slightly less than a quarter of the road deaths. A roundabout is the safest kind of intersection, because there are fewer conflict zones, because speed is lower, and impact angles are smaller than at a conventional intersection.