When the following road sign is placed:

- Only taxis are permitted to stop.· Correct answer
- Only buses are permitted to stop.
- Passenger loading is permitted on holidays only.
- Only unloading of workers is permitted.

Sign 509 marks a stopping place for a taxi to pick up and drop off passengers only. Stopping and parking of any other vehicle is prohibited. The correct answer is 'Stopping is permitted for taxis only.'.
Sign 509 = taxi stop for pick-up/drop-off only
Thinking a taxi may park there
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