That's where we're gonna have to agree to disagree, as I view sharing the road with heavy trucks and buses, especially trucks placarded with HAZMAT, as being "direct involvement" that affects the safety of everyone on the road.
I'm gonna have to agree to agree with Xiggi and agree to disagree with Turtle. Is the mini van driving, soccer mommy going to change her driving habits around big trucks just because the big truck has HAZMAT placards? I'm sure she will think twice before cutting in front of a big truck and jamming on the brakes just because said big truck is displaying flammable placards. It's one thing to get crushed to death, but crushed and incinerated, that's a bit much. Of course if you have made "final arrangements" with the Cremation Society of America, you or your loved one's survivors may be eligible for a 20% discount.
What are the odds of soccer mommy, John Q. Public or Richard Cranium dealing with a HAZMAT situation? I don't have a HAZMAT endorsement but I do have enough sense that if I see liquid leaking from a truck that has black and white placards depicting a hand with a chunk missing from it and those ominous vapor things wafting above the hand, I'm going keep my distance!
Poison placards, I've got a basic understanding of the English language and if I didn't, the skull and crossbones thing might give me pause. Although I see where some could mistake it for a pirate flag and want to meet Captain Jack Sparrow. Same goes for the red flammable placards. I can read, but the flame thing is an attention getter. Explosives, the placard depicts symbolic debris emanating from an epicenter. Pretty straight forward, but I guess it could be misconstrued as a symbol for a strike by a drunken bowler.
I could see including some very basic knowledge about HAZMAT in driver education classes and some basic questions on a written driver's test, but not a mandatory CDL HAZMAT version on a driver test. Law enforcement officials, DOT personnel emergency responders and fire fighters should be educated in HAZMAT and be able to pass a CDL type HAZMAT test.
I was involved in a HAZMAT spill where a dewer of liquid helium broke loose and tipped over in my trailer displaying NON-FLAMMABLE GAS placards. These dewers have a pressure relief valve that expels some helium while in transit. Of course, laying on its side a lot of helium was expelled. I'm sure it looked a bit deadly as the helium vapor poured out from under the roll-up door and then lifted skyward. I parked my truck in the middle of a two block long stretch of one-way street that had a Chinese restaurant on one end and a post office and parking lot at the other end. Nothing in between but vacant land covered with trash courtesy of urban development.
The only person to witness this incident was a City of Minneapolis street worker, who I am sure panicked and called 911 while I was making my way to a pay phone one block over to report to dispatch. As per the CDL HAZMAT procedures, I left the flagged B.O.L. on the drivers seat. My plan was to report to dispatch, wait for the dewer to do its thing, open the trailer door, let the trailer air out and then enter and upright and re-secure the dewer. But the Minneapolis Fire Department's elite Hazardous Response Unit arrived and barricaded both ends of the 2 block stretch of street and cordoned off my T/T with yellow crime scene tape.
The head of this elite HAZMAT Response team was a MFD Captain. This moron freaked and threatened to have me arrested if I crossed the yellow tape to get my bills of lading. He had no FREAKING clue as what helium was or what dangers it posed. He was unable to navigate his oversize HAZMAT regulations books and his mobile command post had no mobile phone link. Of course he believed nothing I said and refused my offer of help to find helium in the HAZMAT Guidebook.
I also was pulled over in Wisconsin and escorted to a nearby scale by a state trooper for displaying Flammable placards on my van, even though I had 2600# of flammable paint and the proper documentation to prove it. He couldn't grasp the concept of a cargo van hauling HAZMAT.
If people that should know all about HAZMAT are clueless, why force the general public to pass a CDL type HAZMAT test?