The Weltevreden Road off-ramp leading to Jakes Gerwel Drive was cordoned off following the heist.
Some drivers even got out of their cars in an attempt to reroute traffic themselves.
Police spokesperson, Captain FC van Wyk, says the Fidelity van came under attack late on Saturday when four males robbed the officers of an undisclosed amount of money.
“On Saturday at 4.15pm at Jakes Gerwel [Drive] and Duinefontein [Road], according to reports, four unidentified males positively armed took an undisclosed amount of metal boxes containing money and fled in a gold Mercedes-Benz,” he said.
“One shot was fired and no injuries were reported. One metal box with cash was recovered.”