Hi,
I think this is not a new issue, but present all the time since I added ETA for Locus, but with BRouter 1.5.x this feature is released and also with the current Locus Version (3.40.2) it is not working correctly.
Displayed ETA is jumping at the turn-instruction locations.
The longer the distance between 2 turn-instructions, the more significant is the effect.
For example this bike-route-section here has a calculated travel time of 4 Minutes:
http://brouter.de/brouter-web/#map=16/50.1181/8.5253/standard&lonlats=8.525176,50.112708;8.512881,50.121238
But when I pass the northern junction displayed ETA jumps up by 8 Minutes.
So it seems for me as a bug in the linear interpolation of ETA between TR locations.
I think this is not a new issue, but present all the time since I added ETA for Locus, but with BRouter 1.5.x this feature is released and also with the current Locus Version (3.40.2) it is not working correctly.
Displayed ETA is jumping at the turn-instruction locations.
The longer the distance between 2 turn-instructions, the more significant is the effect.
For example this bike-route-section here has a calculated travel time of 4 Minutes:
http://brouter.de/brouter-web/#map=16/50.1181/8.5253/standard&lonlats=8.525176,50.112708;8.512881,50.121238
But when I pass the northern junction displayed ETA jumps up by 8 Minutes.
So it seems for me as a bug in the linear interpolation of ETA between TR locations.