Transport chiefs have sparked controversy by putting up signs telling rail commuters to report 'excessive photography' to authorities.

American transport chiefs have sparked controversy by putting up signs telling rail commuters to report ‘excessive photography’ to authorities.

However, the Chicago Transport Authority (CTA) fails to spell out what constitutes excessive photography, reported the NBC website recently.

‘The fact is, photography is not a crime, and the CTA needs to stop treating it as such,’ writes Matt Bartosik.

‘They are not enforcing safety; they’re instilling fear,’ he adds.