Hide non-active routes during turn-by-turn navigation

While navigating the live turn-by-turn view shows a second route in dark blue alongside the active route (bright blue) for example the return leg of a round trip journey. The two colours are close enough that at a glance it's hard to tell which line to actually follow.

This is especially problematic at junctions and roundabouts, where multiple roads are already close together on screen and a driver has very little time to identify the correct one. Adding a second, similarly-coloured route line into that mix makes it easy to follow the wrong road.

It would be better to only show the active route segments e.g. for the next 3 navigation steps while in turn-by-turn navigation mode. Other parts of the route (e.g. a return journey or after the next stop) are useful information and could still appear when zoomed out to a general map/overview, just not overlaid on the live navigation view.