I find it impossible to daydream while focused on traffic.

I read my black on white eink reader on walks and occasionally run into poles and things in the sidewalk. Mostly I look up when crossing a street. When I was a kid I would walk slowly around with a Sci Fi book and read it. Never been hit by a car but every now and then get scared by one I didn’t notice. But I can’t read intense books too much - I alternate hard books and pulpy fun reads.