Scott Dixon dominated the Detroit Grand Prix. But the event may be remembered more for the two-hour hiatus before a final 15-lap sprint in a shortened race.
Sections of the track began breaking up, eventually causing James Hinchcliffe to crash out. The race was red-flagged while marshals repaired the surface and the race length cut from 90 laps to 60.
Dixon held his nerves through three restarts when the race finally resumed. Helio Castroneves spun out having resumed from fifth, meanwhile Dario Franchitti – who originally started 14th – worked his way up to finish second.
Simon Pagenaud claimed third as Will Power slipped from second to fourth in the final laps
The final caution period was caused by Marco Andretti knocking EJ Viso into a spin. Viso had run fourth in the opening stages, holding up Ryan Hunter-Reay and a host of others, brushing the wall and catching a dramatic slide at one point.
Rubens Barrichello had a race to forget, starting 24th and retiring early on with car trouble.
The race leaves the top five in the championship looking like this:
Will Power 232
Scott Dixon 206
Helio Castroneves 177
Dario Franchitti 176
James Hinchcliffe 176
The next races is at Texas on Saturday.