I think they're talking about walking. Riding a bike is different-- for one, it's illegal in a lot of places to ride on the sidewalk in a business district. For

I think they're talking about walking. Riding a bike is different-- for one, it's illegal in a lot of places to ride on the sidewalk in a business district. For another, the transfer of momentum is appreciably less in a same-direction collision between a car/bike compared to head-on.