It won't bring back nun, but might prevent another tragedy (from Philadelphia Daily News)

The memory of Sister Paul Mercedes Perreca's violent hit-and-run death still haunts her Mayfair neighborhood, two months after she was killed crossing Cottman Avenue on her way to morning mass.
With an eye towards preventing similar tragedies in the future, the Mayfair Civic Association formally unveiled a speed radar yesterday that will monitor motorists on a daily basis.
The radar, which resembles a 6-foot-high trailer, was parked in front of St. Matthew's School, on Cottman Avenue near Hawthorne Street, during the open and close of school. Perreca was hit by a red pickup truck as she tried to cross that intersection on Jan. 9.
The radar flashes the suggested speed limit - 15 mph when kids are coming and going to school - and displays drivers' actual speeds, said Scott Cummings, the head of the civic association.
Police officers from the 15th District were on hand to write tickets to drivers who sped past the radar, as they will for at least the next two weeks, said Joe DeFelice, the association's legal counsel.
The radar was funded by a $6,190 grant from House Speaker John Perzel. Perzel previously posted a $5,000 reward for information leading to the driver of the truck that killed Perreca. Her case remains unsolved.
"We don't ever want to knock on somebody's door and tell them their child was run over," Cummings said. "We needed to reach out and be proactive."
If the radar proves to be a helpful tool to police, Cummings said, it will be moved to other locations. The radar was lent last night to a vigil on Harbison Avenue for Demiglio Bell, who was killed by a hit-and-run driver in Wissinoming over the weekend.