Community alert groups are advising motorists to avoid the area if possible.
The protests are thought to be related to residents in the area not having water for the past five days.
@EWNTraffic @TrafficSA @802
ALLENDALE ROAD CLOSED, PROTEST FROM WATERFALL VIEW STATE. NO WATER FOR THE PAST 5 DAYS pic.twitter.com/UzBu5AA0Po— Bafedile (@Fekzo) February 6, 2019