Helsinki records zero traffic deaths for full year

"More than half of Helsinki’s streets now have speed limits of 30 km/h."

This is the only secret.

People over speeding is what kills.

Drivers are actually calm in Helsinki, not constantly honking and slowly rolling into you in the pedestrian crossing either.

Last night two cars tried to drive in front of a tram, on my ride to the Kallio block party.

So while driving is generally calm, and I'm impressed at how often drives stop for the zebra-crossings, despite minimal notice, it's not universal.