Before they started construction on Tzomet Bar Ilan, they had a community meeting to discuss the changes. Among other things, they were sending traffic down the nearby side streets because various turns were being prohibited during the construction. Our community was particularly upset because there are more than eight schools and yeshivos in the neighborhood and thousands of kids cross that street daily. When someone brought up a pedestrian bridge, the city rep basically said, "There are 22 pedestrian bridges in Tel Aviv and no one uses them." Just because a bridge exists doesn't mean the people crossing won't take the easy and unsafe way out (and it will be worse if there is no official crosswalk because of the official bridge).
I can't say I agree with the lady but she does have a point. (There were other, more fundamental issues with it or we would have fought harder.)