The race started at 3.30pm and the starter Gianni Restelli was overenthusiastic turning on the red lights before all the cars had lined up, that resulted in several cars in the middle of the field getting a jump on those at the front. The result was a funneling effect of the cars approaching the chicane, and the cars were tightly bunched together with little room for maneuver. James Hunt was overtaken on the right hand side by Riccardo Patrese and Hunt instinctively veered left and hit the rear right wheel of Peterson's Lotus 78, with Vittorio Brambilla, Hans-Joachim Stuck, Patrick Depailler, Didier Pironi, Derek Daly, Clay Regazzoni and Brett Lunger all involved in the ensuing melee. Peterson's Lotus went into the barriers hard onthe right hand side and caught fire. He was trapped, but Hunt, Regazzoni and Depailler managed to free him from the wreck before he received more than minor burns. He was dragged free and laid in the middle of the track fully conscious, but with severe leg injuries. It took 20 minutes before medical help was dispatched to the scene. Brambilla, who had been hit on the head by a flying wheel and rendered unconscious and Peterson were taken to the Niguarda hospital in nearby Milan.
Delayed Restart
Drivers were allowed to use spare cars, non starters included Peterson and Brambilla who were taken to hospital, Stuck was not allowed to restart due to him suffering from slight concussion, Pironi was a non starter as the Tyrrell team had one spare car and that was set up for Depailler and Lunger was a non starter as he had no spare car available. The race was due to be ready for a restart at 5.15pm. While driving from the pit lane to the grid, Jody Scheckter's Wolf lost a wheel and crashed at the second Lesmo curve, bending the Armco barrier that was situated right next to the track. Andretti, Hunt, Lauda, Carlos Reutemann and Emerson Fittipaldi all went to the spot where Scheckter crashed and upon inspection of the state of the barrier, they refused to start until it was repaired, causing more delay. The barrier was repaired and ready to race.
Second start and race recap
Because of the amount of time clearing up the track after the shunt in the first start and the barrier being repaired plus Scheckter's crash prior to the second start. At 5.50pm, it was announced that the race would take place and the distance would be shortened from 52 laps to 40 laps. The race was restarted at 6.15pm, Villeneuve overtook Andretti at the restart and at the end of the lap, both drivers were side by side but Villeneuve held on to the lead and they pulled away from Jabouille who was running third with Lauda behind him. After four laps, Regazzoni in the spare Shadow went to the pits as he was having his brakes looked at. Jabouille had engine problems after six laps and Lauda took on the pursuit but race control gave Villeneuve and Andretti a one-minute penalty as they were judged to have jumped the start. Andretti took Villenuve with only five laps remaining. With Jabouille having retired, Lauda finished third ahead of John Watson, Carlos Reutemann, Jacques Laffite and Patrick Tambay. Since all of those finished less than a minute behind, Andretti and Villeneuve were dropped to sixth and seventh place. Andretti had won the championship, but with Peterson in hospital, celebrations were muted. The race was also notable for the first finish for Nelson Piquet with a creditable ninth after dodging the Peterson wreckage in the first start.
Death of Ronnie Peterson
At the hospital, Peterson's X-rays showed he had seven fractures in one leg and three in the other. After discussion with him, Peterson was sent to intensive care so that the surgeons could operate to stabilize the bones. There was some level of dispute between the doctors regarding whether all fractures should be immediately fixed or not. During the night, Peterson's condition worsened, and he was diagnosed with fat embolism. By morning he was in full kidney failure due to the embolism, and was declared dead at 9:55am on 11 September 1978.
Classification
† Peterson suffered severe leg trauma in a multi-car accident but was otherwise conscious. However while in hospital the night following the race he was diagnosed with a fat embolism. He died the following morning as a result of the fat embolism.
