Mick F wrote:One chevron per road?
Those chevrons told lies.
The up one was much much steeper than the down one, and it got steeper as I climbed, with the sharp right turning even steeper.
You can see it by the contours, but at least I knew I was going to have a tough time of it.
Surely they are there only to inform that there is a section that reaches the specified gradient?
Length of that segment is not given or indeed relavent.
That information is contained in the contour lines.