Recent attacks on people in pedestrian zones using hijacked trucks around the world give rise to concern.
I have seen overseas, I believe it was in Prague, hydraulically actuated bollards protecting public squares that can be remotely raised – and lowered when access was appropriate. They could also be configured to lower for a minute when touched on top I recall.
The South Australian Government should prioritise doing so here in high profile public areas in Adelaide like Rundle Mall, Victoria Square, North Terrace and the new broad War Memorial footpath leading up to the War Memorial on North Terrace as well as at the forecourt for the new Oval and prominent Churches.
These facilities would ideally be remotely monitored and jointly controlled by both the Police and Traffic Monitoring Centres. Coordination with any Emergency Services responses would be a key aspect of the mechanised bollards.
Once implemented at the most prominent areas, phased implementation around public building forecourts and roads, like The Parade at Norwood, that are at regularly closed to traffic for pedestrians to participate in big public events, would be similarly hardened.