Temperature was 28 degrees outside. Car had 4500 miles on it. Car warmed up for 10 minutes before driving. At the one mile mark, it locked up at 31 mph and 1.4 rpm. It would not accelerate and it maintained the speed and rpm without pressing on the gas. The brakes did work. It lasted for another mile and then resolved. No indicator lights came on. The car did. It recognize there was a problem. It has not been replicated. It is available to be inspected. Not being able to accelerate above 31mph poses significant risk to both my family and other drivers.