For Route and Matrix calculations, minor roads are loaded in memory, but in some scenarios, due to a smaller number of minor roads loaded in memory, the route calculation may result in longer routes. If the user feels that the route returned from the engine is not optimized, they can use the localRoadsLoadFactor to load more minor roads in memory to improve/optimize the route or matrix results.
The following example depicts two routes: one with a lower value and other with the highest value of the parameter:
Note: The brown route was calculated with localRoadsLoadFactor=1 while the orange route with localRoadsLoadFactor=3 is much shorter.