[GraphHopper] Question about traffic signals

[高安琪]

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.

[image: 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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