Modifier in roundabout turns in can be confusing

[daniel-j-h]

In mapbox/mapbox-navigation-android#184 a user got confused by roundabout turns where we announce something like "at the roundabout turn left".

The idea behind this is the user should leave the roundabout to the left. But the "turn left" can be seen as confusing because you turn right to enter the roundabout in a right-hand sided driving country.

We should probably announce roundabout turns differently maybe "leave the roundabout to the right" or similar (not a native speaker, sorry).

osrm-text-instructions/languages/translations/en.json

Lines 368 to 389 in 7485f85

	"roundabout turn": {
	"default": {
	"default": "At the roundabout make a {modifier}",
	"name": "At the roundabout make a {modifier} onto {way_name}",
	"destination": "At the roundabout make a {modifier} towards {destination}"
	},
	"left": {
	"default": "At the roundabout turn left",
	"name": "At the roundabout turn left onto {way_name}",
	"destination": "At the roundabout turn left towards {destination}"
	},
	"right": {
	"default": "At the roundabout turn right",
	"name": "At the roundabout turn right onto {way_name}",
	"destination": "At the roundabout turn right towards {destination}"
	},
	"straight": {
	"default": "At the roundabout continue straight",
	"name": "At the roundabout continue straight onto {way_name}",
	"destination": "At the roundabout continue straight towards {destination}"
	}
	},

Note: when we introduce a roundabout exit instruction in osrm (Project-OSRM/osrm-backend#4358) we should double check that roundabout turns are atomic and do not come with an extra turn instruction to leave the roundabout.

cc @miccolis

[hdaymon]

I believe that this is handled in https://github.com/mapbox/directions-voice-instructions/issues/18

[MoKob]

@hdaymon the exit rotary part is unrelated to roundabout turns. A rotary is a large roundabout with a dedicated name (or traffic circle, not following roundabout rules).
A roundabout turn is a tiny traffic circle that does feel more like an intersection.

A possible solution here could be to use Leave the roundabout to the left instead of At the roundabout turn left. With this reformulation, I would assume that the confusion @daniel-j-h mentions here cannot happen.

[1ec5]

How about leaving out any mention that there’s a roundabout? It’s just secondary information, akin to “at the large intersection”.