On 12/01/2018 18:07, Frederik Ramm wrote:
This is something that any routing engine for a road network must do

Never quite understood the logic for this splitting.

When a router traversing a way encounters a node it does a check to see if other ways are connected, If they are, it analyses the tags on those ways & decides if needs to go down one of them or continue to the next node. There's no requirement to split.

DaveF

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