The Boulder City Council gave initial approval Wednesday night to changes to rules governing food truck operations, but those changes do not include the late-night and residential service many food truck operators would like to see.

Boulder city staffers have recommended allowing more mobile food trucks -- four instead of two -- to operate on private property downtown in specific areas.

The ordinance also would allow food trucks to operate in designated city parks again this summer, based on a pilot program last year that received positive feedback from operators.

Licensed food trucks now can operate in rights-of-way in industrial zones and in business, mixed-use and downtown zones with property owner approval, but they cannot operate within 150 feet of restaurants and residential districts.

The rules on operating times and locations were created three years ago in an effort to strike a balance between the food trucks and brick-and-mortar operations.

Last summer, a pilot program allowed the trucks to set up in popular Boulder parks, and offer late-night business at the Park Central Building's parking lot, near Arapahoe Avenue and Broadway. Few food trucks took advantage of the late-night option, with operators citing limited foot traffic and not enough lighting for safety.

Food truck operators want to be able to operate downtown after restaurants close and hold an event once or twice a month along 13th Street, in the location of the Farmers Market.

A public hearing and second vote on the food truck rules will be held in May.