Just paint a biker-shaped scorch mark on the asphalt.

I got shocked by those in Oregon while biking regularly when I lived there. Trick is to touch the metal frame with your legs and hand as you go under and it doesn't hurt

"We know these power lines are in a dangerous location (as confirmed by three concerned engineers who approached us independently of each other), and are likely to injure or kill people if they sag too far in the summer heat, but the state legislation hasn't been updated since the '40s when the lines only carried a fraction of today's amperage, so we're legally in the clear."