We visited London to look at the signage system used to help people navigate around such a big city. This would help us with our Tenbury Wells brief as we would have the opportunity to use these signs to guide us through London. We would then find out what is more important to be included on our own information boards.
This was a photo of the sign just outside the Natural History Museum. It gives information on walking distances to areas of interest from that location as well as a map simple street map and then a zoomed in version of that street map showing more places in that area.
This is the side of he sign giving people information numbers to ring if they have any questions as well as other places they can get more information.
Here is a closer image of a street map and is exactly what you need. It's simple, uses a limited yet effective range of colours highlighting the main attractions.
Here is an example of the font used on the sign, it's perfect for the job being really clean and easy to read.
Here are examples of signage within hyde park. I found these pretty cool especially the top image with the amount of detail put into the map as well as highlighted all the train stations around the park.