You can also see where there are S58s in force and pending via the www.roadworks.org
site - go to Map Layers - Advanced and select the tick box for S58s. It will only show those areas where the data is available but doesn't give the details of the restriction.
You can find out further details from the Highway Authority as the Streetworks register is a Public Register.
Downstream ~24336.33 kbit/s - ~2970.74 KB/s
Upstream ~10224.86 kbit/s - ~1248.15 KB/s