wrote:

I've read that one of the most common injuries treated on
the Tour de France is broken toes caused by the team car
tires rolling over the toes of spectators.

The imbecility of spectators cannot be underestimated.

I've volunteered as a course marshal for bicycle races, some
on closed roads. When you do this, you discover that the world
really does look different from inside an orange vest. People
will do remarkably dumb things. Like step off a curb into
the path of a motorcycle leading a big pack of fast-moving
bicyclists, despite being cautioned, yelled warnings, and even
occasionally physically restrained. Some motorists also behave
badly - people will do rather risky things to avoid a 10-second
delay - but thankfully I've only had to suffer verbal abuse
and not had people drive through the cones onto the course.