Emergency crews were called to the south end Wednesday morning after a traffic control employee was hit by a vehicle on Hollis Street.
The 39-year-old man was controlling traffic near the entrance of the Westin Nova Scotian.
Halifax Regional Police say the man and the driver of a vehicle trying to leave the hotel parking lot got into an argument.
They say the traffic controller was struck at around 10:30 a.m. when he stepped in front of the vehicle to stop it from exiting the lot.
The man was treated at the scene for non-life threatening injuries.
Police say their investigation is still in the early stages.