LIKE Ralph Roberts (Letters, October 29) I also use the A9 regularly, at least once a week, and I absolutely agree with him that you have to drive within the limits of the road, not your own .

However I am concerned that he feels he has the right to take a dashcam snapshot of a few seconds of someone else's driving, which he (and he makes no reference to having any formal training) has decided is dangerous; and to attempt to get that person into bother. Leave aside for a moment the obvious question of whether Mr Roberts himself ever makes mistakes. An error to him may, to the "offender", be something unavoidable.

On the A9 recently, approaching a point where the outer lane disappeared, I was at the head of a small line of vehicles and was overtaken by a vehicle already indicating to move safely into the nearside. However, ahead of me a vehicle came out of a layby into a ridiculously small gap and accelerated as rapidly as he could away from me, thus forcing the overtaker to stay in the outer lane longer than he intended to. There are two sides to every coin, and the police can generally see the whole of any alleged incident.

The A9 does not need to be patrolled by amateurs.

Scott Macintosh,

4 Alder Crescent, Killearn.

WHILE it is re-assuring to know that the average speed cameras are working on the notorious A9, I wonder how many foreign tourists know exactly what the numerous road signs along this route mean.

I recently travelled for a distance on the A9 north of Perth and although there were speed camera signs every mile or so, I did not pass one sign indicating what the correct speed was for each particular part of the road. As foreigners are frequently involved in road accidents on this road, should we not provide this information too?

Gillian Craig,

12 Whittingehame Drive, Glasgow