AndyS asked me to post this on his behalf:
As far as any recommendations beyond IAN 163, the only thing I’m aware of is the likes of Intellicone http://www.intellicone.co.uk/ which, oversimplifying things, flashes and screams at workers if an errant vehicle knock over a cone that has a lamp with an Intellicone sensor fitted into it. The system does more than that though, so I’d recommend getting in touch with the vendor for further details – they’re very friendly and helpful people. I’m vaguely aware of a similar intrusion detection device from another manufacturer but what it’s called I can’t recall.
Intellicone can be very effective at stopping vehicles entering full road closures, the flashing lights and siren are very obvious. Please note that it’s not something that will stop the seriously determined driver, who thinks that “ROAD CLOSED” doesn’t apply to them, but it does reduce the number of incidents. It needs careful managing though, to ensure you get good, efficient utilisation of the kit – workforce training in the use of this equipment is highly advisable.