Originally Posted by gatecrash
Not always true.... In the herringbone parking in Liffey Valley Driving out of a space means you are having to change direction approx 135 degrees to not be going against the flow of traffic. There is a one way system in operation there.
Diagonal parking is different. The design of herringbone car parks are to make the process of parking quicker. Usually these spaces are at 45 degrees, so (as you say) its much safer to drive straight in, and reverse out. But because of the angle of the parking spaces combined with the one way systems, it's easier to see when you are reversing back, so it's not all that "dangerous" (although there is a danger element to all reversing, be very alert for things like children in car parks).
I don't personally like those 45 degree spaces because you lose 2 spaces in each row, and it's harder to see at a glance where the free spaces are.
But again, use common sense. I know that reversing into a car parking space is nearly always safer with typical 90 degree spaces, but if I was going grocery shopping, it's also hugely inconvenient in terms of loading the boot - so sometimes I'd just drive straight in, and make sure to be extremely vigilant while reversing out!