More food trucks will be hitting the streets of Calgary this summer as a city pilot project grows in popularity.  

The program started last summer with 10 vendors. Now it's set to expand to 30.

Some businesses and restaurants were concerned about parking problems and unfair competition when the trucks began operating. But Mayor Naheed Nenshi said there's no evidence the street eateries are biting into restaurant profits.

"It really just goes to show how food trucks are filling a particular niche as opposed to competing with existing restaurants," he said.

"I think there's a market there and we were able to help that market work."

The food truck pilot program finishes at the end of October. The city is still determining what policies and regulations will be needed if the trucks are allowed to become a permanent fixture on Calgary streets.