Display speed limit on road

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/request-a-feature/display-speed-limit-on-road/
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Would be good to have an option to always display the maximum speed limit, as well as have an audible warning if it's exceeded.