The Uber ride-sharing app praised Mexico City's decision to become the first city in Latin America — and the largest in the world — to issue official regulations for such smartphone-based services.

Uber's spokesman for Mexico and Central America says the company doesn't mind paying 1.5 percent of the proceeds from each ride into a transport-improvement fund. Luis De Uriarte says Uber hopes the fund will help improve conditions for pedestrians.

The city's medallion taxis groused Thursday they hadn't been advised before the rules were issued Wednesday.

But paradoxically, official cabs may be the biggest beneficiaries.

The head of the city transport department says ride-sharing apps pay more to the city fund than official taxis do.

And Rufino Leon said that money would go "preferentially" to improving existing cab service.