How can i keep birds from perching on my power lines?

Apparently, someone designated my driveway as an aviary bathroom. My drive is covered with bird crap, especially noticeable in a diagonal line leading from the power pole to my house. Luckily for me I have a car port. Sadly for my girlfriend, I can’t fit two cars in there.

Is there anything non-gaudy I can put on the edge of my roof or possibly hang on the power line itself to discourage birds from resting there and painting my pavement?

here’s some ideas