Yellows didn't mean much in those days; and it was common to leave cars on the track after a crash if they weren't in the way. Wrecker technology wasn't what it is today and cars often had to be removed by manpower which could be pretty tough if something no longer rolled. In 1947 Shorty Cantlon tangled with Bill Holland and crashed to his death going into Turn One (what we would call it today...back then the whole south end of the track was often called the South Turn and what we now call Turns 3 & 4 was known as the North Turn). His car was left on the track for the remainder of the race. And in 1949 Duke Nalon's wrecked Novi was left on the track for the remainder of the race as well. A wrecker actually tried to pick up the car from just outside the wall but the big Novi was just too heavy. And the yellow light for Nalon's crash lasted exactly 1 minute and 45 seconds. After that the green light came back on and the remaining cars simply raced through the burning fuel running down the track. In those days yellow lights were more like local yellows on a road course today. You slowed in the area of the crash but you pretty much kept up your speed the rest of the way around the track even though you could not pass.Originally Posted by ZOOOM
Starting somewhere after about 1950 IMS at least started moving wrecked or stopped cars into the infield areas.