Soapbox derby in the 70s

I came across these old pictures from a contact print. Obviously taken in the late 1970s. I was at Gurney Drive with two of my ex-colleagues from Ban Hin Lee Bank and we were taking pictures of a Scout soapbox derby. Many schools were involved and the organisers managed to close off a portion of Gurney Drive for the races. It will be almost impossible to pull this off now. At that time, I was using a Canon A1 film camera with a f1.4 50mm standard lens, not one of the multitudes of digital cameras we see now. Anyway, I noticed now that the PFS Scouts were also participating. I wonder whether they do such activities nowadays.