Not sure where to ask apart from RMS or RTA or DMR or whoever / whatever they're called these days…
I know they've been there a good while but I what's the deal with the number of overhead electronic speed signs between Penrith and Wentworthville? At any point you can generally see one set, sometimes two, a few times today I noticed three, and each set contains at least 3 signs. Contrast to most other motorways with a single sign on the side if the road every 5km or so. Which sign and / or metal fab company got this contract?
Its designed so that the speed can be adjusted depending on the circumstances, i.e. break down, accident. Lane closures are also done using these signs.
They have them in Melbourne also.
https://roads-waterways.transport.nsw.gov.au/projects/m4/ind…