Formula One has hit the brakes on a proposed 2019 race in Miami, shelving plans until at least 2020.

After Miami city authorities delayed a crucial vote — initially set for July 26 — until September, F1 has decided to put the race on hold rather than sign off “on a sub-optimal race track.”

“Whilst our preference would have been to race in Miami in 2019, there was always a point by which delivering the best possible wheel-to-wheel racing experience for our fans, drivers and teams wouldn’t be possible in the time available,” F1’s managing director of commercial operations Sean Bratches said in a statement.

F1’s US-based owner Liberty Media is keen to add a second US race to the calendar alongside the Unite States Grand Prix, which has been held in Austin, Texas since 2012.