Table 3 Comparison Between Mixed and Segregated Approach

Mixed Segregated
Definition Utilises streets and areas for mixed NMV/MV use Measures that segregate vehicles and pedestrians; such as dedicated lanes. Segregation can be in terms of time or space
Conditions Appropriate on low–flow roads and NMVs can mix safely with vehicular traffic below 30km/h. NMVs can also mix safely with vehicular traffic at speeds between 30km/h and 50km/h unless volumes are high or there are significant numbers of trucks Preferable when traffic flows are heavy or speeds are above 50km/h and there are few side roads. Above 65km/h segregation is necessary for the majority of NMVs. Segregation is best suited to new areas and developed early in the planning process, though can be applied at later stages
Advantages Relatively easy and inexpensive to implement using existing road space
  • Provides a safe and efficient network for NMVs
  • gives priority to NMVs
  • suitable for areas with high volumes of NMVs
Disadvantages
  • mixing slow modes with motorised traffic can reduce road capacity
  • safety issues for NMVs due to presence of motorised vehicles
  • does not visibly promote pro-active NMT policy
  • expensive to implement (especially in existing urban areas where there is a lack of road space)
  • difficult to enforce
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