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Parkoviště

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==Classes Best practices for different types of crossings==Crossings can be classified according to the number of single and split(double) roads involved in the crossing. For each of these there exist solutions to prevent U-turns.
==3-Way-Crossings==
*Simple Single road crossing a split dual road (SSD)
[[Image:Crossing_SSD.jpg]]
*Split Dual road crossing a simple single road (DDS)
[[Image:Crossing_DDS.jpg]]
*3 Split Dual roads crossing (DDD)
[[Image:Crossing_DDD.jpg]]
[[Image:Crossing_SSSS.jpg]]
Ah, the "Mother of all Crossings"! We are lucky that almost all crossings look like this. It is possible to define each and every turnrestriction with a single node, and U-turns do not happen when all 4 roads in this junction are locked (No, there is no evidence for thisthat. But each and everytime a simple crossing does allow a U-turn, at least one of the roads was found not to be locked. If all roads are locked, Waze routes you around a block instead of making a U-turn).
*Split Dual road crossing 3 simple single roads (DSSS)
[[Image:Crossing_DSSS.jpg]]
This is an ugly crossing if you come from/go to the SE. You get a direction to "Turn left, turn right". First check if the double road can be made into a single one, so you get a SSSS. If that fails you may want to join the double lanes into a single node, creating a sort of half-mapcat-bowtie.
*2 Split Dual roads crossing 2 simple single roads (DDSS)
[[Image:Crossing_DDSS.jpg]]
This one allows for U-turns to be made if you enter over one of the double lanes.
*3 Split Dual roads crossing 1 simple single road (DDDS)
[[Image:Crossing_DDDS.jpg]]
Ugly! If you can not turn this one into a SSSS or DDSS, consider adding an extra fork on the single road and create a DDDD.
*4 Split Dual roads crossing (DDDD)
[[Image:Crossing_DDDD.jpg]]
This crossing allows U-turns in each and every direction if no precautions are taken.
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