If the bushes have lots of buds that you would like to see bloom, I would recommend staking them up.  This will also prevent them from blocking a part of the walkway.  However, if they have recently bloomed and new buds have not yet formed, I would recommend pruning them back about a foot, especially the top heavy branches.  In order to help prevent this from happening each year, you may want to prune them back more severely in the fall and then again in the spring in accordance with this helpful University Extension link:  https://extension.umd.edu/resource/guide-pruning-roses

Debbie

For the Baltimore area, we would recommend pruning between now and up to August 1st (so it's more accurate if we say late summer, rather than fall). Louisiana State has a more up-to-date and detailed description of how to prune Knockout roses. https://www.lsuagcenter.com/profiles/rbogren/articles/page<personal data hidden>69

Christa