Add speed limit data for roads. This is already available and open source from OpenStreetMap data.
It would be really helpful to plot routes avoiding lower and urban speed limits. The create a route function is great and chooses good windy roads however sometimes when you come to ride the route you find those great bends are on low speed limit roads! If we had the speed limit data we could adjust routes accordingly.
ITO World used to provide a speed limit map using OpenStreetMap data before they discontinued it. They confirmed to me they just used open source data to provide the service so hopefully it could easily be incorporated into MRA.
See here: https://wiki.openstreetmap.org/wiki/Ito_Map and here: https://www.itoworld.com/ito-map-announcement/