[talk-au] Tagging for the router

Nick Hocking nick.hocking at gmail.com
Wed Aug 31 23:37:41 UTC 2016

"My suggestion is that the map data is the best place to store that

Actually - the wiki page is very specific on this.

"When a particular turn restriction is *the default* for a given
jurisdiction *and* is *not signed* *don't map them*. It is much better to
ensure that routing engines embody the regional rule rather than mapping
every occurrence as a turn restriction."

Ok so how do we "ensure that routing engines embody the regional rule:?

E-mailing their support address and asking them to study the road rules for
every jurisdiction in the world is not going to cut it. So maybe the only
way is to name and shame them in a public forum somewhere, but where?

I don't think that there is a routing engine out there that won't suggest
crazy +90 degree turns on a high speed road.

Probably, the only solution is to advise users to always check the "don't
allow u-turns" box on their navigators.

Also - how do we map a signed "U turn permitted" at traffic lights where
the default is "not permitted"?
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