I've just completed a weekend of driving in the UK. There are a couple significant UI and routing problems that lead to confusion at junctions.
UI colours - when using traffic on your route, congestion shows as blue, red or orange BUT other main routes (motorways) show as a slightly darker orange making it very hard to see where your route may be progressing in certain circumstances.
Commands at large junctions or roundabouts - These can be really confusing/dangerous. When joining a motorway via a large junction or roundabout ABRP will often show a left turn arrow at the start of the junction it will say "bear left" BUT the route will actually be a right turn on a roundabout, with perhaps 4 lanes of traffic. Combined with the map colours large junctions can be quite stressful.
I've added you as a voter to a previously submitted feature request matching your request for improvements; abrp.upvoty.com/b/request-a-feature/change-traffic-colors
Blue is the standard color of the route line, meaning no congestion.
Orange means moderate congestion OR a leg with planned decreased speed (depending on if you've allowed the 'adjust speed' option in settings)
Red means significant congestion
Dark red means severe congestion
Could you let us know which map type you're currently using and include a screenshot of where motorways are the similar color to the route line?
Would it be possible for you to provide an example of a junction or roundabout where we show confusing instructions? Either with a link to a short plan in ABRP or with gps coordinates.
I'm using ABRP via android auto (I'm not using reduced speed plans) I have attached a junction screen shot that shows the colour similarity. It can be hard to read when navigating on my integrated car screen which has typical contrast for a car screen (worse than mobile handset).
I have also attached the google maps solution, where colour are more obviously different.
This also a shows a roundabout ( 51.503056, -0.616720 ) that had poor routing. Another example is ( 51.414727, -0.971097 )