Bike paths reduce injuries

Infrastructure is a public good, expenditure, from the common wealth.

Helmet sales is a privatized band-aide over bad infrastructure given
over to the Automobile, having the  coin operated Governing leverage
in the US,

GM got to destroy the Public transit trolleys , foran example ,
and got a court to slap their hand, but were not forced to replace it.

Remember It's  the National Defense Interstate Highways System.

Useful for moving troops to quell any Cairo style insurrection,  now.