On Sat, Nov 29, 2008 at 1:11 PM, Nic Roets <[EMAIL PROTECTED]> wrote:
> > > On Sat, Nov 29, 2008 at 10:04 PM, Scott Atwood <[EMAIL PROTECTED] > > wrote: > >> Perhaps someone who understands how this feature works should add a few >> examples of ways that have been properly tagged as turn restrictions. >> I recently added several turn restrictions in this vicinity, and I admit I >> was quite confused by the documentation, but I did the best I could. After >> this discussion I am even less sure I did it correctly. Perhaps someone >> could take a look at what I did wrong and it could serve as an instructive >> example for learning. I'm OK with being used as a public example. :) >> >> >> http://www.openstreetmap.org/?lat=37.33944&lon=-121.87191&zoom=17&layers=B000FTF >> > > This one is quite easy to fix. > http://www.openstreetmap.org/browse/relation/53025 > Just add http://www.openstreetmap.org/browse/node/65529280 as the via node > > Here I assume that driving down S 17th, you are forced to turn right into E > San Fernando. Routing software will not evaluate staying on S 17th, because > it becomes an oncoming oneway. > http://www.openstreetmap.org/browse/relation/53021 > So the only thing to prevent is a left turn into Arroyo Way. So change "to" > to Arroyo Way and add 65500440 as the via node. "restriction" can remain > equal to only_right_turn, or you can change it to no_left_turn. > This is actually quite a complicated intersection. Arroyo Way is a two-way street that dead-ends at S 17th / E San Fernando intersection, so you can not enter this intersection from Arroyo Way. The block of S 17th St. north of E San Fernando is a two way street and the block of S 17th St. south of E San Fernando is a one-way street going north. The one block of E. San Fernando west of this intersection is a one-way going west. Traffic approaching this intersection from the east (northbound / westbound Arroyo Way) is blocked and can't enter. Traffic approach from either the north or south on S 17th St. must turn west onto E San Fernando. I see you added many only_left_rights, but I didn't implement it because I > don't know what it was. > There are some intersections in this area that have a barrier across the right lane entering into a street. That means straight-through traffic must turn right or left when approaching this barrier. Similarly, traffic approaching this intersection from the cross street can make a turn into the street protected by the barrier either. For example, S 16th is a two-way street, but there is a barrier at E San Carlos. Drivers going southbound on S 16th St. must either turn right or left at E. San Carlos and may not continue southbound on S 16th St. even though the road continues as a two-way street. These barriers are intended as traffic-calming measures to foil cut-through traffic and limit cars on the protected block to only those who have a destination on that block. -Scott -- Scott Atwood Cycle tracks will abound in Utopia. ~H.G. Wells
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