Sorry for late response. Check this URL around page 115 of the report or page 131 of the PDF http://www.empcommission.org/docs/A2473-EMP_Commission-7MB.pdf ht

Sorry for late response. Check this URL around page 115 of the report or page 131 of the PDF http://www.empcommission.org/docs/A2473-EMP_Commission-7MB.pdf http://www.empcommission.org/docs/A2473-EMP_Commission-7MB.p... Or google around for "Report of the Commission to Assess the Threat to the United States from Electromagnetic Pulse (EMP) Attack" The TLDR version is cars are pretty much EMP proof, although its a central tenant of some survivalist belief system that "EE is magic therefore all modern cars will stop running in any attack at any level" A good way to protect electronics from an EMP is to make it physically small and in a metal cage either insulated from ground or really really well grounded. Like a car, or a diesel locomotive. Train engines will survive. Their signalling and billing systems, maybe not so much, so in practice that's as good as knocking them out. I would think an electric locomotive or trolley would be a hopeless situation. Whats usually missed in survivalist type lit is a "mission kill" does not mean opfor is completely physically vaporized. Knocking out 10% of cars on the road is almost as effective in the long economic run as vaporizing 100% of them. You're going to get China to make replacement parts for cars that haven't been made in years delivered in six months and meanwhile those cars can sit abandoned clogging the roads for weeks until they're all towed plus or minus 10% of the tow trucks being broke and you're gonna do this during the riots? 10% of the population including police fire and doctors just aren't going to go to work for weeks until they arrange transport? Sure. Or, you don't need to vaporize every SCADA system at every chemical plant and refinery, just a couple will be quite enough to make a dent in the industrial safety record. So yeah, after an EMP event, of whatever source, if 95% of cars or whatever are unaffected its still a HUGE problem, because 5% of "the modern world" is pretty large indeed. Its possible to generate an electric surge locally stronger than the ionosphere could ever generate, and people are forever trying to sell semi-portable microwave based weapons to the police and army. They don't work very well even at strengths higher than EMP level. Below thermal levels its unusual for transmitter sites to knock out cars. 99% of cars and service trucks laugh off a mere 50 KW broadcast transmitter. There's a 750 KW UHF TV transmitter in my area, you're not supposed to, but employees can drive up to it while its transmitting and cars are like "whatever". Supposedly a coworker burned out his car radio antenna input driving to a mountain top tower site, although the rest of the car was unharmed (its always a friend of a friend story, never happens to anyone first hand). Mountain tops are covered with extremely high powered transmitters. A lot of skyscraper buildings have some remarkably high power transmitters on top. Even if the building is an antenna null, the neighboring skyscraper certainly isn't in a null, LOL.