These days of a suicide bomber I believe in what I term a sacrifical defense in depth. A local national DOD or LEO troop with a sidearm for self defense only so he can work and search arriving vehicles 200 meters from main entry of the facility.
100 meters from that checkpoint a US troop armed in the same manner does a second visable check then allows the vehicle to pass to a point 50 meters from ECP to a bomb dog check....
All the troops with sidearms at those inital search points are covered by guns in fixed hardened facilities and or mobile light armored vehicles M113's or hardened Hummers in hull down positions armed with Ma Duce and or Mk-19's covering them along with three designated marksmen with Barretts or Ronnies new payload rifle covering his back as he searches the vehicles. After he does and initial physical search then the next station in the checkpoint is a explosive detector dog team covered in the same manner.
A maze of barriers keeping all vehicles from doing over 5 miles per hour will stop those intent on killing and discourage those who want to bring a vehicle onto secure facilities vs leaving their ride in a parking lot 300 meters from the ECP.
Obvious visable security in depth with invisable whuppass crew at each entry point would number say 15 troops per shift/watch with rotation/relief conducted in house every two hours for maximum alertness and minimum boredom per having to ride the wire per se.....
Just my idea, opinion as to how I'd do it.....as at any given point of the process they get one troop vs many. I'd also suggest one privately owned commercial vehicle point of entry to a base billeting troops with 6 or more ECP's for the troops and their vehicles to preclude establishing a pattern route for anti-ambush purposes when they return.
A pre-delivery supply depot that processes supplies and materials yet holds or stores nothing. Example. Yousif delivers a semi load of bottled water. That truck or load doesn't go into a secure base. It's unloaded, inspected and reloaded on to DOD transport for delivery to the secure facility. No commercial bulk or small delivery vehicle should get within a mile of the camps or bases.........free fire zone .
Stay safe !
You're right of course, but they won't do it, citing manpower, costs etc. I wouldn't even post how bad it is.