Bad roads for pedestrians and drivers

John compares Washington and Tremont streets. Washington is just too wide for pedestrians to get across safely:

It's like running for a touchdown.

Tremont, though, has too many crosswalks to be safe for motorists:

For drivers, it's an accomplishment to make it from Mass Ave to Berkeley without being rear-ended, having to slam on the breaks at every corner for someone jumping off the curb.

Hmm, what are your worst streets for crossing in Boston?