The fact that drivers are sold the idea that they are as good as tire chains but they are only good in relatively shallow snow.
This is how our government works, a bureaucrat that has no experience or special knowledge of a job or device makes laws or approves it. The businesses donate money and then they get special favors and legislation in return, please don't tell me you weren't aware of this before.
As I stated before I have never felt the need to chain up in 4 inches of snow and I don't see any other drivers doing it so as stated they provide little benefit. I do see where they would provide a benefit at docks that are on an incline since the water will run down and freeze where your drive tires would be. As far as the added danger I answered it in the previous question.
Already answered first part. As you get moving faster the centrifical force will start drawing the chain in shorter and give you less traction. The weight of the truck and load will certainly apply force down on the chain to keep it under the tire but there is more weight and momentum pushing the truck forward and off the chain. If you get into a situation where you are braking hard and the wheels start locking up even momentarily with ABS you will no longer have any chain under the tire.
Well the only company I saw advertise how fast the chains deploy claimed it happened in 1.5 seconds, it would take about .5 seconds to realize the problem, and .25 seconds to react which equals 2.25 seconds which if you lost control already is to long. The next obvious issue is that this driver would have to fight the natural instinct of getting the vehicle under control which would be to brake, steer, or let off the throttle so really these would have been the first reactions and then you have to add in even more time for the reaction to engage the chains. The other issue would be that this guy apparently lost control unexpectedly while driving along, if he was going slow enough to engage the chains then all he really needed to do was let off the throttle to get traction back.
Well by what users here have said and what the company says it seems they are only good in a few inches of snow maybe a little more if it is dry powder.
I guess you have never heard of the pile ups in poor visibility then. Use Google to search accidents caused by fog, smoke, poor visibility, etc. there are plenty of them. They are frequently caused by a vehicle moving at a slower rate of speed which causes vehicles behind them to brake and go even slower, pretty soon you have a chain reaction where vehicles in the back almost come to a complete stop. When you have poor visibility and a vehicle that is barely moving being approached by a vehicle that does not see them and on slippery roads it is obvious what will happen.
The proof is in your statements and your reasons for using automatic chains. Everyone seems to acknowledge that they are not as effective as full chains so you know very well that you are using a less effective device which decreases safety and could also put the truck in a situation where the snow is to dense or gets over a few inches deep so the auto chains won't even work. You can't sit there and say the chains give better traction so that is why you use them, you use them because they are easier and don't require you to work.
My point was simply that just having the auto chains does not make you legal as some seem to believe and that they are marketed as being legal and meeting the stringent requirements of chain laws which is very misleading.
I never said anything about your driving skills but it is clear what your concerns are.
I was simply pointing out the truth about why you use auto chains, as stated before they are not better in any way other than you don't have to get out of your truck and you do know they are not as good. I have no problem with you considering my statements to be asinine and would not be insulted by it if you actually showed me how I am wrong. If you simply say this comment is asinine or wrong but have no proof or any counter to it other than because you say so then it is an insult and just proves my point that you have nothing to back up your statement after I gave specific reasons and examples.
I said I researched the possibility of getting them, anytime you research something you can simply search terms like automatic chain problems, complaints, issues, etc. and find websites of people that say a product is junk or people that stand up for it. You have mentioned that you accept the user's opinions here because they have actual experience but I have none so my opinion isn't valid despite the fact mine is based off of a much larger pool of people than the 3 total here. If they work for you that's fine but you know very well you are using a product at the expense of decreasing the safety of yourself and everyone around you so that you don't have to get out of the truck. You have not proven that statement to be wrong and there really is no way to given the facts of the effectiveness of automatic chains vs full chains. Why not try and actually show proof that I am wrong instead of just saying I am wrong?