Even before the first Formula 1 cars drove through the Miami International Autodrome, problems with the asphalt were discovered on Thursday. Damage to the road surface occurred in the long Twisters, Turn 7 and Turn 17, the start-finish corner. This was caused by a known issue with the asphalting process at these locations, meaning there were no concerns about other parts of the track. In order to avoid real problems, parts of turns 7 and 17 were repaved overnight from Thursday to Friday.
On Friday evening, however, the decision was made to make another surface attempt at turn 17, while working on the corner exit at the same time. This had not yet happened during the night from Thursday to Friday. In an updated version of the Event Notes from the Race Directorsent to the teams on Saturday morning by Race Director Niels Wittich reads: “The apex and exit of Turn 17 has been resurfaced.”
Before the first F1 weekend in Miami, there was also a lot to do around the pit entrance. A narrow chicane with curbs had been set up there. After Wittich had already decided on Thursday to allow the speed limit of 80 kilometers per hour for the chicane to come into force, there were still concerns about safety, especially on the curbs. This is especially true in the race when the drivers are driving at the limit. Driving over the curbs too hard could then lead to a collision with the pit wall. After a discussion at the driver’s briefing, it was decided to remove the curbs before action got underway on Saturday, and that has since been done, Wittch reports in his Event Notes† “The pit entrance curbs have been removed and replaced with a post at each apex.”