Could FREE be used in all these contexts:
1. The road was FREE in the wee hours so is reached early.
2. When i get FREE from my office i will attend the meeting.(or RELEIVE/or any other word)
Free can mean unecumbered or, alternatively, without charge.
So the road could be free for two reasons;
1 there was no charge (toll) to use it or
2. there was no traffic (quiet without obstacles)
you should add so 'the destination was' reached early
Better to say "when I am free from my office "
'When I am relieved from my/the office would be OK