You need to contact you city's municipal council (Zarząd Dróg i Zieleni most of the time, but different towns use different names) and find out... could be a fault, an oversight, or a deliberate cost saving measure... posting here will not get that resolved.
Wulkan...What is your problem anyway?
Didn't think i'll see the day when I'll agree with Dp1... but such is life! ;-)