→Use of the Parking Lot Road Type
==== Use of the Parking Lot Road Type ====
The Parking Lot Road type exists to allow the mapping of parking lots, while discouraging the routing server from using them for navigation.
There has been some discussion about whether it is better to use Parking Lot Roads throughout a parking lot, or just on the entrances and exits. One concern with using Parking Lot Roads throughout is that, when navigating to/from a destination inside a large lot, every segment incurs a penalty on the desirability of a route. As a result, the server will favor the route involving the fewest Parking Lot Road segments- -which may not be the most direct or convenient route (e.g., a small back entrance off of a minor access road, rather than the main entrance). Another concern is that incurring a large penalty up front (due to multiple Parking Lot Road segments) dilutes the relative effect of routing penalties elsewhere, such as breaking turn restrictions or directionality. The proposed solution is to use the Parking Lot Road type only on entrances and exits, and using Street type within, minimizing the effects on the routing server. This requires additional vigilance; if two entrances are changed to Street type, the lot will essentially be open to through traffic. However, until the routing server addresses this issue of penalty dilution, keep this strategy in mind if you are seeing Waze give bad directions when large parking lots are involved.
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