@Pozzovivo
I agree that it would likely made a huge difference at the end of bunch sprint stages, so i guess it could be tried out there first. Before reducing the peloton to 90 riders and doing such test. Realistically what do you feel has bigger chance of being tested out first? As for potentially reducing or increasing the number of riders. This are i guess always options but not necessarily to be safety orientated ones. Having less riders would statistically likely reduce the number of crashes, overall. But as said relatively speaking i don't see on how 90 riders split in the teams would fit any better then 180 riders. On occasions the bunch would still form and they still wouldn't fit. So for this mid stage bunches i feel that other solutions would need to be implemented it's just that currently nobody has put too much thought into it and hence solutions seem sparse. I am rather sure that solutions exist, to improve rider safety when riding in a bunch, regardless of the number. After bunch sprint finale gets cleaned up, of bloat, then we can try to do something about that too, addressing bunches in the middle of the stages. On what possible solutions are without changing the sport too much if at all.
I think you’re raising reasonable questions, but I also think your main objection is built on a misunderstanding of what “fewer riders” is supposed to fix. Let me respond properly for once.
You get a clean test of this in every breakaway stage or reduced bunch sprint. The peloton splits in three. Break, GC group with helpers, and dropped riders. Almost never dangerous stage. Basically never a mass crash. This would be more frequent with fewer riders for dynamic reasons.
You're right of course, apeloton will always be longer than the road is wide, whether it’s 90 riders or 180. The real problem is
how many riders are forced into the same positional contest at the same time. And why are they?
Crashes mostly happen when two things coincide: limited road space and a big incentive to be near the front (this also increases speed). In those moments, a huge number of riders all try to move into the same top positions because being 60th instead of 20th can be race ending in terms of result. That is what produces the “washing machine,” the chopping, the overlapping wheels, and then the big domino crashes.
Reducing the field size changes that mechanism in a way that “other solutions” often do not. With fewer riders, you don’t just reduce crowding a little. You reduce the number of people who feel they must be top 20 right now, and you reduce the number of bodies and bikes available to be swept up when something goes wrong. Even if a bunch still forms mid stage, it behaves differently. Fewer simultaneous move ups, fewer lead out trains and positioning domestiques, less accordion effect, fewer chain reactions. And the key thing is that big peloton crashes are not linear. They are contagion events. One touch of wheels becomes five riders, then fifteen, then thirty because there is no space or time to react. That cascade potential grows with field size. So the effect of reducing riders is very plausibly disproportionate, not just “half the riders equals half the injuries.”
Of course other measures matter too. Sprint regulations, barriers, course design, enforcement, equipment, all of that can help at the margins. But a lot of these are downstream fixes: they try to manage the consequences of a high pressure environment rather than reducing the pressure itself. Field size is an upstream lever. It directly lowers exposure, reduces interactions, and reduces the intensity of the positional battle that creates risk in the first place.
So yes, start with sprint stages if you want a trial. But the “90 riders still won’t fit so it doesn’t help” argument doesn’t hold. The benefit is that fewer riders are compelled to fight for the same limited space, and when something inevitably happens, fewer riders get taken out in a cascade.