How many American 16/17 year olds can afford a car? Perhaps more than I realized.
In Britain the insurance cost is so high it's prohibitive for many teenagers. Although based on a quick search, it's significantly less than the average American teenagers pay. Perhaps that shows the lack of alternatives Americans have -- "Teenagers pay an average of $371 a month for an individual car insurance policy" yet "Nationwide, 76.3% of high school students aged ≥16 years reported having driven during the 30 days before the survey".
In the UK, "people in the 17-to-19 age group ... pay ... an average cost of £752 a year" ($1000/year, $85/month), yet only ~20% of licensed school/university students use a car to get to education. (I can't find statistics just for 17-18 year olds. Driving to "high school" would be extremely rare, maybe 1% -- it's not even mentioned in the surveys.)
Nowadays, many people in Denmark using bicycles to carry a child have upgraded to e-bikes. Larger bikes (e.g. "Christiania cycle") to carry multiple children have been electric a while longer, although these are expensive.
A cheap used car isn't necessarily a huge expense (they start around $3-4k in my area, despite the current shortages), and you don't necessarily need an individual policy or even your own car if you can borrow a family vehicle. It isn't free but many in this age range would have a summer job which could easily cover the expense.
When I was in high school some decades ago the upperclassman were allowed to drive themselves, and many did. I was not one of them, being rather young for my grade, but I can easily understand the appeal of a 16-minute car trip (never mind the prestige among your classmates) vs. the 45+ minutes I spent on the bus each way.
E-bikes are a nice middle ground but many have warnings discouraging their use by minors (sometimes backed by local rules—eight states limit unsupervised use of e-bikes to those 14 and older) and the decent ones (new) can cost almost as much as a used car.
In Britain the insurance cost is so high it's prohibitive for many teenagers. Although based on a quick search, it's significantly less than the average American teenagers pay. Perhaps that shows the lack of alternatives Americans have -- "Teenagers pay an average of $371 a month for an individual car insurance policy" yet "Nationwide, 76.3% of high school students aged ≥16 years reported having driven during the 30 days before the survey".
In the UK, "people in the 17-to-19 age group ... pay ... an average cost of £752 a year" ($1000/year, $85/month), yet only ~20% of licensed school/university students use a car to get to education. (I can't find statistics just for 17-18 year olds. Driving to "high school" would be extremely rare, maybe 1% -- it's not even mentioned in the surveys.)
Nowadays, many people in Denmark using bicycles to carry a child have upgraded to e-bikes. Larger bikes (e.g. "Christiania cycle") to carry multiple children have been electric a while longer, although these are expensive.