What factors lead to this accident?

Last Monday, my colleague Kate came to work with news from near where she lives in Revere of a pedestrian struck and killed. We haven't found the story in the Globe, yet, but here are a couple of small pieces about it:
WHDH
FOX

Obviously, these are pretty sketchy and preliminary, and there's more information to be had, but I have some questions:

Was the pedestrian in a crosswalk? How fast was the car going? What was the speed limit?

The WHDH article includes a quote from a witness:

"Between the car being black, the pedestrian being dressed in black, with the weather being what it is and the poor lighting...it was just a tragic accident," said Keith Donnelly, a witness.

While wearing black at night does reduce one's visibility to cars (at a week-long festival I attend, people who don't make themselves visible at night are called "darkwads"), there are other factors at work in this -- and other -- accidents, and which we often take for granted and forget to consider:

Design speed: We all know what a speed limit is, and we all know we break it at least some of the time. This is because the speed that a section of roadway is engineered to handle gives us cues that tell us we're safe at higher speeds. Studies have shown that drivers recognize and understand the subconscious clues of roadway engineering and limit themselves by design speed rather than posted speed at least some of the time. Is the design speed for this stretch of road appropriate for the pedestrian use it gets?

If the pedestrian was in a crosswalk, how well-signed and -lit is the crosswalk? Especially if this is a fast stretch of road where pedestrians are relatively infrequent, it's important to call attention to crosswalks and make them as visible and noticeable as possible.

If the pedestrian wasn't in a crosswalk, is it because pedestrian needs aren't served here? Where was the nearest crosswalk?

Yes, drivers are responsible for being attentive to other road users, and pedestrians are responsible for the same, but sometimes the deck is stacked against all users. Whenever I read about a pedestrian accident, I want to know if this was one of those times.

Traffic accidents -- both lethal and non -- are a tragedy for us all.