Four cyclists wearing identical kit does suggest a ream time trial and their configuration across the road and large crowd suggests the finish line.
You might be right, but cyclist no.2 (from the left) seems to be pedalling hard as his legs aren't even a blur. The legs of the others can all be made out reasonably well, which might suggest they are coasting at that point. That doesn't seem quite like a finishing line to me, unless they were under team orders to let no.2 win.
And I could be wrong, but the orange isn't perhaps the right shade for a Dutch national team.
It's very hard to be sure on this, as the original was rather faded. I did a bit of tweaking, and maybe others have done this too, but I can't be sure that I got it right. Moreover, different brands of colour film had different characteristics, so the same colour in life wouldn't always look the same on film.
With these shirts, as well as the colours I was wondering if the pattern was identifiable - black with orange(?) shoulders and upper arms.