Hello Ben F !!
I KNOW that YOU already know the answers - heh - and so do I.
Those first two photos are of the 5th Avenue EL in Brooklyn. I have them in my collection and KNOW what the intersections are.
The 3rd photo is a Turtle Roof 1000 series BMT EL Car at the 36th St Station next to the abandoned former steam-era massive Elevated Yard and its abandoned multi-track elevated structures seen at left --- the car or train is heading outbound to leave the 5th ave EL at the nearby Y junction - and turn and head east to go over to the Brooklyn 3rd Ave EL...where it turns left - or south, to eventually go to the 65th St Terminal of that EL, and connect with the BRT Trolley there.
The next (4th) picture is looking inbound from the end of the single center island platform of the Atlantic Avenue EL Station on the BMT Fifth Ave EL with the train heading inbound toward where the 5th Ave EL a few blocks away crosses under the higher Fulton St EL (seen in distance) and does the slight S curve there into Hansen Place and eventually merges a couple of blocks further into the Myrtle Ave EL near that EL's Navy St Station.
I already have all these displayed photos in my BMT EL print photos collection for many decades time now.
Happy Holidays ! - Joe F
