The A27 south coast trunk road used to be exclusively lit by SOX, but its practically all gone. There is none left in Hampshire, but in West Sussex, a small section east of Chichester, by the Portfield roundabout still survives.
Further east at Worthing its all gone as well, except for
this MA60 which has escaped, probably helped by the tree.
In East Sussex, a stretch a couple of miles long with both central reservation, slip road and verge examples still survives at the Hove and Brighton interchanges.
This is the scene at the A2038 junction for Hove.
This is the scene at the A23 interchange for Brighton.
All these images are from a dash cam. I can't see these installations surviving much longer.
Meanwhile, over in Belgium, once a stronghold of SOX lighting, the Dutch enthusiasts have found information that was asked in the Walloon parliament about SOX replacement by LED.
Translated it reads:
The Walloon Government announced that by 2021, the entire Walloon road network should be lit by LED lamps.
Last year, the Walloon executive had already decided to equip motorways and national LEDs on some 2,300 km of roads (875 km of motorways, or 73,000 luminaires).
The announcement of the Walloon Government therefore extends this decision to the 6,200 km non-structuring Walloon road network.
By 2021, 18,000 LED luminaires will replace the older generation of luminaires.
In order to implement this objective, a budget of 20,000,000 euros is needed, which is spread over four to five years (more than 4 million are planned in 2018).
In addition, this proactive policy aimed at modernizing public lighting allows us to achieve structural savings, in particular by reducing energy consumption by 57%.