Going to respectfully disagree with you.
EMP would disable most all government vehicles and communication devices.
Used to be back in the 80’s the government/military were into shielding but that has not been the emphasis the last 20-yrs.
Nuke command and control, the White House, as well as very few other agencies will have some protections but their vehicles and comm systems generally will be worthless, and how will these government agencies notify all their people to come to work and how will they get there when a) their go-to-work-vehicles will be fried and b) most will want to stay home, or desert and go home to protect their own families.
And the “gangs” will be even more limited because they will be shut down by an EMP. Eventually, they may get their act together but not immediately, or months after the event.
Shoulders of highways will be less crowded and can be overcome to get outta Dodge.
Depart early, have a plan, route, and a location where you can find relatively sparse populations, i.e., good neighbors.
“Used to be back in the 80’s the government/military were into shielding but that has not been the emphasis the last 20-yrs.”
Because 25 years ago the SDI/EMP testing came to the conclusion that it ain’t gunna happen and will have little effect.