store signs need a crowbar to be picked up.
more store signs can be picked up, etc, the riverside suites sign (https://map.projectzomboid.com/#13227x2970x6170)
the rosewood medical sign (https://map.projectzomboid.com/#13227x2970x6170) and just about any sign thats on the first floor that is a square.
the spiffos drive through burger can be picked up, (https://map.projectzomboid.com/#13227x2970x6170)