[GraphHopper] Question about traffic signals

[dos65]

Perhaps it may be easier to import traffic lights nodes as tower nodes?

On 27.02.2015 22:54, Peter wrote:
> Hi,
>
> this is possible but kind of tricky with the current import procedure. 
> You'll have to determine which OSM nodes belond to which GH node (keep 
> in mind that for certain situations, especially for car, one OSM node 
> could also be on an GH edge). So you will need to store a traffic 
> signal counter per edge and put it e.g. into the flags. Please read 
> also through: https://github.com/graphhopper/graphhopper/issues/75
>
> Regards,
> Peter
>
> On 27.02.2015 20:24, 高安琪 wrote:
>> Hi,
>>
>> I am a student majored in computer science from University of 
>> Nottingham. There is a group project for my second year module. We 
>> are working on adding new features to Graphhopper.
>>
>> We try to show the number of traffic signals to user on Graphhopper.
>>
>> We get the number of traffic signals by using node.hasTag(). Then 
>> store it in OSMWay.
>>
>> We show the number of traffic signals for specific way on the 
>> front-end. (we do it in the same way as showing road name of specific 
>> way)
>>
>> The problem is that user may pass through a part of road(OSMWay), not 
>> entire road(OSMWay) and it shows the total traffic signals on this 
>> roads which is useless for user.
>>
>> E.g. There are 2 traffic signals on Ilkeston Road, user will 
>> encounter one of them. We do it in the way mentioned above and it 
>> just shows the total traffic signals instead of the exact number of 
>> traffic signals user may encounter.
>>
>> 内嵌图片 1
>>
>> May I ask is it possible for us to show exact number of traffic 
>> signals user may encounter. If we could do it, may I ask for some 
>> suggestions about how to implement it?
>>
>> Regards,
>> Anqi
>>
>>
>>
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>
>
>
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