[theluketaylor]

Average speed cameras seem unbelievably dangerous to me. I haven't ever driven somewhere with them, but I suspect all I'd be thinking about was the speed limit, resulting in very dangerous driving. With all my focus on making to correct average I'd fail to properly track other drivers and potential hazards.

I'm much happier with a flow of traffic enforcement. Ticket those who speed excessively beyond what traffic is generally flowing and let the posted limit be more of a guideline.

[hansvm]

If you're trying to game the detection system to minimize travel time then average speed cameras could encourage pathological behavior (which would hopefully also be caught by careless/reckless driving laws). They're dead-simple and not subject to cosine error and sensitive closed-source calibration techniques though. Even accounting for clock skew and clock drift, if an average speed camera says you were going x+2ϵ mph then it's safe to say you were going at least x+ϵ mph for at least some small interval and some very small value of ϵ.

[DevoidSimo]

There are no traffic lights for the ones I've seen here, so you can just set your cruise control. I would be doing this anyway on a long drive, which again is the only place I've seen these