Hi Eslavko,
Actually the time is never estimated from the maximum allowed speed, but it is base on the vehicle profile.
Here's the default vehicle profile ('Car') taken from
https://github.com/navit-gps/navit/blob ... #L201-L217 :
Code:
<vehicleprofile name="car" route_depth="4:25%,8:40000,18:10000" flags="0x4000000" flags_forward_mask="0x4040002" flags_reverse_mask="0x4040001" maxspeed_handling="0" route_mode="0" static_speed="5" static_distance="25">
<roadprofile item_types="street_0,street_1_city,living_street,street_service,track_gravelled,track_unpaved,street_parking_lane" speed="10" route_weight="10" />
<roadprofile item_types="street_2_city,track_paved" speed="30" route_weight="30" />
<roadprofile item_types="street_3_city" speed="40" route_weight="40" />
<roadprofile item_types="street_4_city" speed="50" route_weight="50" />
<roadprofile item_types="highway_city" speed="80" route_weight="80" />
<roadprofile item_types="street_1_land" speed="60" route_weight="60" />
<roadprofile item_types="street_2_land" speed="65" route_weight="65" />
<roadprofile item_types="street_3_land" speed="70" route_weight="70" />
<roadprofile item_types="street_4_land" speed="80" route_weight="80" />
<roadprofile item_types="street_n_lanes" speed="120" route_weight="120" />
<roadprofile item_types="highway_land" speed="120" route_weight="120" />
<roadprofile item_types="ramp" speed="40" route_weight="40" />
<!--roundabout does not apply to OSMaps -->
<roadprofile item_types="roundabout" speed="10" route_weight="10"/>
<roadprofile item_types="ferry" speed="40" route_weight="40"/>
</vehicleprofile>
So if you edit your navit.xml file, and add a block similar to this one you can create a motorhome-specific profile.
I guess that you would need to change at least "street_n_lanes" and "highway_land".
Once you have a profile you're satisfied with, we can add it to the default config for the other motorhome users out there.
Let us know if you have more questions!
K-
