Understanding Sign codes

The sign codes that come with the instructions, eg

  • 7 keep left
    -3 Sharp left

Include
101 pt start trip
102 pt transfer
103 pt end trip

What does
pt stand for
how does 103 pt end trip differ from 4~finish
And when would 5~reached via be used?

pt means “public transit”, it is a special instruction only needed if you follow this guide:

And when would 5~reached via be used?

If you request a route with more than 2 locations, then “reached via” means you reached the second location.

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