Generally, open source refers to a computer program in which the source code is available to the general public for use or modification from its original design. Code is released under the terms of a software license. Depending on the license terms, others may then download, modify, and publish their version (fork) back to the community.
England and Wales have a somewhat arcane but interesting set of laws around what tracks are rideable by motorcycle. Some of them are nice simple lanes that could be ridden on any motorcycle by anyone. Others appear to be just a jumble of rocks that need a superstar to ride.
I must come back and write more about the laws but what interests me right now is being able to identify those rights of way and being able to navigate along them when I'm out for a ride.