How to Prune Hibiscus 

How to make hibiscus grown straight up become more bushy and thicker? Any information would be helpful cheers mate.

I have a very large hibiscus bushes about 15 of them on my driveway I have to cut it down, sometimes I'm thinking getting chainsaw and cut it down would be a lot quicker, there are tall and thick over a decade old, All very easy to get white flies doesn't matter even spary them