[Pearls Before Swine]

Nothing like limping along as you try to move across several lanes on an interstate where everyone else is going 70.

That's what blinkers are for! Of course, their functioning might be iffy if you've got a massive electrical system failure on your hands.

[Right Wing Assault]

That's what blinkers are for!

Good luck with that. Someone going 40 mi/h (or whatever limping speed is) faster than you is not likely to slow down to your speed to let you change lanes. Try it some time. At best it will set off a massive traffic jam. On the worse side, you will get rear-ended, which will set off a massive traffic jam.