[Openstreetmap] key values to represent restricted turns

[Frank Mohr]

Tom Carden wrote:
> On 1/23/06, Simon Hewison <simon at zymurgy.org> wrote:
> 
>>If anyone can think of any better way of representing such constructs,
>>please discuss it here.
>>
> 
> 
> How about something like a property on a node like
> no-turn=a.b,c.e,e.d; where a/b/c/d/e are segment ids for segments
> connected to that node, and order matters?  All other combinations are
> fair game for routing.

this would also solve the problem in situations like this

                <-
   <->      /------------------
-----------*
            \------------------
                ->

but in my opinion, the oneway tag should belog to the line

Another problem I found are traffic lights
Each day I see two junctions like this
I'd collapse that junction to a single point
as it just looks bigger in ascii art as on the map


--------------------+---+---------------<- (1)
------------+-------+---+------+-------->-
             \      |   |     /
               A    B   C    D
                \   |   |   /
                  \ |   | /
                    +   +
                     \ /
                      |
                     (2)
                      |

(remember we are driving on the wrong side here in Germany ;-)

(1) -> (2) from the left  side goes over A without traffic light
(1) -> (2) from the right side goes over B with traffic light

(2) -> (1) to the left side goes over C with traffic light
(2) -> (1) to the right side goes over D without traffic light

	

	
		
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