Overhead route marker

Where you'll see it

Above the lanes most appropriate to the movement which is indicated

What it means

To inform in advance that a particular numbered route changes direction at the intersection ahead or that the cross-street at the intersection ahead is a numbered class-B route

What you must do

Make sure which route you want to follow, slow down for the intersection and take the correct route

Source: Signs manual GE12.6, GE12.7, GE12.8