Why did the Dutch smartphone user cross the road?

Because the pavement LEDs, as part of a trial in the municipality of Bodegraven-Reeuwijk, told them it was safe to do so

In the future, you won't even have to look up from your phone to cross the road.

The Dutch municipality of Bodegraven-Reeuwijk is testing a new system for traffic lights which embeds a thin strip of LEDs on the pavement before busy road crossings, to signal to inattentive smartphone users whether or not it's safe to step out.