The NTT IndyCar Series teams and drivers have only had a single 90-minute practice session to get to know the new downtown Detroit street circuit so far, but early impressions are that it’s unlike any other venue on the calendar.

Short, narrow and bumpy, the track already promised to be one of the most challenging for passing or trying to find a clear piece of road during qualifying. But one of the big question marks is how the unique split pitlane will factor into the race.

“When the sessions started, there were quite a lot of cars coming in, four-wide, into the funneling section,” said Arrow McLaren’s Felix Rosenqvist, who was fifth-fastest on Friday.

“It’s kind of unique in that way because the pit speed limit off section is way further, like after the funnel. We’re going to have to figure out who’s going first in there. I think there’s going to be some situations where people probably don’t want to lift.