Is It Driver Error? even CNN did a report that most of the run away cars happened near high voltage grid systems most cars have shielded computers might be the problem.
Primary power wires generate strong magnetic fields. Most shielding--and car electronics goes through extensive interference testing--is designed to protect against electrostatic and electromagnetic fields, but is less effective against low frequency (60 Hz for power) magnetic fields. You need to remember a little physics to undertand the difference. I suppose it's worth looking into.