I know it’s a joke question but here’s a serious answer:

I would treat it same as any other aircraft landing on the roadway. Give them space to do their thing because objects of greater potential energy ALWAYS have right of way, regardless of what liability laws say. Can’t sue ‘em if you’re dead.

As for laws, a quick search didn’t find anything in Federal or Alabama law about it except that the FAA here in the US says pilots consider it only as a last resort option due to safety concerns. If figure it’s probably not a common enough occurrence for laws to be made about it. Other states or counties may have something about it though.

A few general traffic laws apply:

1: The UFO is not a legally registered road vehicle and they must yield to all traffic.

2: If you see a hazardous situation, like the UFO not clearly following traffic laws giving you space, you must do your part to avoid injury by avoiding a collision.

So after you do brake for the UFO, or swerve and honk, you may go to the police and inform them of the aliens' traffic violation. They may then get a fine.

If you say "fuck it Im in the right" and crash into them, you are both breaking the law, but you are in bigger trouble for willfully endangering life and property. You get prison, the aliens get a fine.

Your last sentence is the answer. Your driving manual probably says “drivers must yield to other vehicles occupying a lane”, which in your example would be a UFO.

Speaking as a Voxon who captains a Kerglyz KG-7 scout craft (with the boosted manifold), I feel like I can offer an interesting viewpoint.

If we hover before landing it is a sign that we see you and are yelding to you, you can just pass under us, but please, to make it clear that you understand the situation and to alert us if we have strayed into your path inadvertetly, just flash your highbeams twice, indicating that you see us and intend to pass.

We are normally just doing surveys and gathering data, we are doing our best to stay out of the way.

The first rule of the road is "right-of-way won't help you when you're dead".

They're already violating US airspace. I'm not going to yield to anything violating military borders within my home. It'll have to vaporize or abduct me.

if it drops down, reverses direction and increases speed, then you'd better run.

It's probably best if a driver yields to a flying saucer.

Give up your right-of-way when it will help prevent collisions.

When entering traffic, you must proceed with caution and yield to the traffic already occupying the lanes.

https://www.dmv.ca.gov/portal/handbook/california-driver-handbook/laws-and-rules-of-the-road/

If its hovering above the lane and you can drive under it without crashing and it seems like it isn't going to land or inte ding to land, there is no law requiring you to yield but I personally would try to switch lanes and not be directly underneath it.

If it seems like it is going to land, I would yield to it same as a plane landing on a highway, but usually highway police are there to start a traffic break after being radiod by local ATC anyway.

There is no need to put on your hazards, they can see that you have stopped. If they can't, then it doesn't matter since they can't see you.

I would honestly recommend trying to leave the area as quickly and safely as you can, because if it isn't hostile already, it will be when the army arrives.

so, Just for the record.

They're bigger than you are. This is like those tiny subcompacts that try to keep a giant truck from entering their lane.

Sure, you're in the right. Still dumb to not let them in.

Incidentally, however, it's important to note that things hovering in the sky will likely be pushed out of the way instead of the otherway around. All those helicopter's blocking cars? a kid could push it out of the way. (it just has alot of inertia, but it's got nothing keeping it from moving.)

Only if they are also illegal, transgender, dog-eating, convicts.

One incidental purpose of the Interstate Highway System is as emergency landing strips. But a VTOL craft should be able to make use of even the roughest roadways in the event of an emergency. Activate your hazards to alert the craft and any surrounding drivers of extraordinary circumstances.

Be prepared to render aid as necessary.

How can you distinguish between native and alien UFOs? Once you've identified where it is from, is it still a UFO?

You should yield to them, for the same reason a fly yields to a human hand trying to turn them into goo.

The UFO could be issued a citation for taking an unauthorized vehicle on a public roadway, which would give you a very strong case to have them pay for any damages to your car in the event of a collision.

However, if you don't have full coverage, or uninsured motorist coverage at least, you will be in for a battle with your insurance company when they can't track down the other driver (pilot?).

As always, defensive driving is your best bet. Avoid the collision and none of the other details matter.

The math might change if it's one of those anal probe aliens, though. No judgement if that's your thing, but I also won't blame anyone for avoiding that situation even if it costs them a few out of pocket repairs.

Depends on if they're signalling to land or not. Do they have hazards on or are already on descent? Since the responsible thing as a driver is to avoid any conflicts where I can, I'd give way being an unusual event, just like I'd let someone cut across lanes to get to an exit. They're at fault and the anomaly, but if I can keep from being part of an accident I'll do it. Trying to be dominant on the roadways at all costs is what causes many of the accidents.

I'd just treat it as an aircraft that is making an emergency landing, and not try and hold my lane because I have the right of way. That won't end well for anyone.

No.

You were there first, and it’s your god given right to drive an automobile. These illegal aliens coming over here and landing on our roads should respect our laws.

If they crash into you, sue them, as is also your god given right.

I would recommend a dashcam.

Yield? I recommend a U-turn. Laws be damned, the authorities are gonna have more important things to worry about.

The correct answer depends on whether or not you know where your towel is.

No, because a UFO is subjective. If you’ve never seen an airplane or a drone before, it may be a UFO. To most other folks, it’s an IFO.

Don't be silly. Americans don't know how to yield. Every time I have to go through a traffic circle I make sure to update my will first.

You have the right of way unless there is a pedestrian or a sign warning you of animal crossings. If you see a UFO, pull over and contact a mental health professional immediately.