Traffic Flows
Suburbs typically have longer travel times to work than traditional neighborhoods. Only the traffic within the short streets themselves is less. This is due to three factors: almost-mandatory automobile ownership due to poor suburban bus systems, longer travel distances and the hierarchy system, which is less efficient at distributing traffic than the traditional grid of streets.
In the suburban system, most trips from one component to another component requires that cars enter a collector road, no matter how short or long the distance is. This is compounded by the hierarchy of streets, where entire neighborhoods and subdivisions are dependent on one or two collector roads. Because all traffic is forced onto these roads, they are often heavy with traffic all day. If a traffic accident occurs on a collector road, or if road construction inhibits the flow, then the entire road system may be rendered useless until the blockage is cleared. The traditional "grown" grid, in turn, allows for a larger number of choices and alternate routes.
Suburban systems of the sprawl type are also quite inefficient for cyclists or pedestrians, as the direct route is usually not available for them either. This encourages car trips even for distances as low as several hundreds of yards or meters (which may have become up to several miles or kilometers due to the road network). Improved sprawl systems, though retaining the car detours, possess cycle paths and footpaths connecting across the arms of the sprawl system, allowing a more direct route while still keeping the cars out of the residential and side streets.
Read more about this topic: Suburb
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