Like most things, when you look at pedestrian crashes and fatalities, these tragedies can be averted in a very simple way~but there is the cost to motordom of not getting on its vehicular way with the briskness drivers have come to expect. Many of the pedestrian fatalities and serious injuries happen when vehicles are turning left through a marked pedestrian crossing when the pedestrian has the right of way.  You can of course go ahead and build substantial infrastructure to narrow streets and build proper infrastructure. But there is one very simple way  to save lives at low-cost.  That is using the “pedestrian interval” as demonstrated in the YouTube video below.

 
As this article in CityLab states “Leading Pedestrian Intervals”  or LPI s  are streetlights that give walkers a head-start before cars venture into an intersection. Given even a few seconds of priority, most people wind up at least halfway into the crosswalk—where they’re plenty visible to drivers—before cars are allowed to go straight or make turns (including the ultra-dangerous left).”
When San Francisco, Los Angeles and Seattle adopted Vision Zero (with the goal of no lives lost to road violence) they also used LPIs at heavily used intersections. “New York City has been a leader, adding 2,201 since 2014 for a total of 2,483 across the boroughs. Now, nearly 20 percent of signalized intersections citywide have LPIs, according to a report by the advocacy group Transportation Alternatives. They give pedestrians a 7- to 10-second head start. Most are located in the city’s highest-risk traffic corridors.
And there are huge cost savings. The average cost of reconfiguring a crosswalk for an LPI is $1,200. As a New York City spokesperson noted “They don’t require any trench digging, concrete pouring, or lane closures. Sometimes new push buttons and controllers are needed; often engineers simply study local traffic patterns and reprogram existing lights.”
Research is showing that the use of LPIs can reduce pedestrian-vehicle collisions by 60 per cent.  A 2016 study of 104 intersections in New York City saw a decline in pedestrian and bike fatalities and severe injuries of  40 per cent. A report done by Transportation Alternatives suggests that these “head-start” lights for pedestrians may be the reason for the huge decline in New York City’s pedestrian fatalities, as many are the result of vehicles failing to yield in intersections. As the executive director of Transportation Alternatives states “Dollar for dollar, this is a really smart, life-saving investment that ought to be a part of any city’s effort to eliminate traffic deaths.”