I find the problem isn't people merging into your lane in front of you, but doing so badly (ie not leaving a safe amount of space behind their rear bumper and your front bumper).
Semi drivers have this even worse.
That's the worst problem I see around here -- cars in the freeway running bumper to bumper, and then a block of 3 or 5 cars also running bumper to bumper trying to force their way in, but none of the cars really leave enough room for a smooth merge, so the cars on the freeway end up hitting the brakes when the merging cars force their way in.
There are some advantages to driving a semi in traffic:
- Lots of gears to choose from and massive torque in order to find that perfect 'idle forward' speed.
- Far more comfortable ride then a car, it's not even close.
- Radio communication with trucks ahead, so you know what's happening ahead and which lane to be in long before the cars figure this out.
- Visibility over the top of vehicles in front (except another truck, obviously).
I think the only thing better than a semi for heavy traffic might be a luxury car with adaptive cruise and a little roof-mounted drone-cam that you could launch to check out the view ahead (though this sounds like something Homer Simpson would dream up). Your own little personal traffic copter/R2D2, with a recharging dock on the roof. Someone please tell Elon Musk to make this a priority for new Teslas. It could even check out side streets in cities and find quicker routes.
Heavy load = longer stop distance = lengthier minimum safe following distance
Minimum safe following distance > 1 car length = motorists darting in front of semis
Rinse and repeat. Assuming a heavy load and ignorant motorists, there's no way to avoid constant unsafe situations. As soon as you create a new safe gap, someone slides in.
So, no. It's terrible. (And I'm not even mentioning the additional gear shifts)