[GraphHopper] Driving Time Graphhopper vs OSRM

[Guillaume PAILLET]

Hello,

We are testing Graphhopper and OSRM and we have found some differences in routing times :

- Graphhopper returns longer driving time as OSRM does (except for very short distance between 2 cities). It appears that OSRM driving durations are closer to the real durations compare to Graphhopper.
- We have set  same speed parameters (when there is no max speed) on Graphhopper (carflagencoder.java) and OSRM (car profile).

Both Graphhopper and OSRM seems to be using CH.

How to explain these difference in driving time ? Is there a way to modify parameters on Graphhopper to get driving durations closer to the real ones ?

Thank you

Guillaume