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Mike Waltrip won at Talladega and then popped up thru the new hatch designed to aid drivers in exiting the race car.
The Talladega race was the first event that the exit could be used at.
The alternate exit project was created at the NASCAR Research and Development Center and took 13 months to develop.
Installing the exit was optional. The kit costs about $150.00 and requires about 15 hours to install.
The alternate exit allows drivers to exit through the top of the racecar. The hatch is about 2 feet X 2 feet. Steel cable pull cords open cockpit. The hatch is secured by a latch system. Both the driver and safety crews can open the hatch.
Before allowing the modification, NASCAR performed crash testing. Crash dummies other than Waltrip were utilized, and roll over data was collected. These test were performed primarily at the University of Nebraska's Midwest Roadside Facility.
The #15 of DEI with Michael Waltrip driving was the only car that competed with the hatch system in place.
Jack Roush said his teams had no interest in adding the device to their cars unless NASCAR made it mandatory.
Here is a related cartoon on this issue written last October: Greenhouse effect