Repossessed by the Federal Housing Administration; acquired by the city's Housing Authority

On the other side of this wall is the Little Sisters of the Poor's Queen of Peace Residence.

My understanding is that the X-in-a-square you sometimes see painted on a vacant building warns firefighters that the structure is compromised and should not be entered unless absolutely necessary.

There's a big Caribbean population out here in Cambria Heights/Queens Village, so I think it's a good bet. (Compare to the flag of Trinidad and Tobago.)

For drilling sewer lines, I believe

VARIOUS ARTICLES USED IN
RELIGIOUS SERVICES OF ALL FAITHS
WERE DONATED IN MEMORY OF

ERNEST P. PALCIC, JR., SP. 4

WHO GAVE HIS LIFE
IN THE SERVICE OF HIS COUNTRY
VIET NAM — JANUARY 24, 1968

BY THE EMPLOYEES OF
WILLOWBROOK STATE SCHOOL
AND THE
BENEVOLENT SOCIETY FOR RETARDED CHILDREN
APRIL 1969

A DOT palimpsest! See if you can make out the previous destination this sign pointed toward. Here's a larger version of the photo, and here's the answer.

Looks like it's been parked here since about '68.

Branch flagging — another vestige of the recent cicada invasion

a.k.a. Osage orange