When I organise car parking for an event, I try to arrange parking spaces at a 45 degree angle to the incoming flows. This seems to allow more vehicles into a given space, and certainly makes it easier for drivers to get in and out.
The other day I heard an interesting item on radio from a mathematician. He had worked on optimising the use of car park space, and had concluded that you can fit in 23% more cars in a typical surface car park if you organise one way flow into and out of the park, and use Angled spaces. It reduces the amount of spare space you need to allow cars to turn into spaces, and improve the flow of vehicles in and out. If you add more exits than entrances it reduces delays from traffic even more.
We are short of car parking in many places in the UK. Getting cars off the highway and into parks is good for cutting congestion, good for reducing emissions, and good for drivers trying to get to work, the shops, schools or wherever they need to go. I think Councils should look at this suggestion and see if they can improve the flows in their parks and raise capacity. The only cost is a bit of new line painting in most cases. It should raise them more revenue as more cars get to use the parks, and more are enticed in away from more contentious parking on the highway. Indeed, expanding car park places could be allied to some reduction in on highway parking where that causes obstacles and delays.
I have suggested to my local Council that they take a look at this.