TOW (& Answer)...

This week’s question was: Running beneath Avenue 50, the ________ Elementary School pedestrian underpass is one of the few Los Angeles school pedestrian underpasses still in use.  The answer is Aldama Elementary School. 

This question (& answer) were found on page 47 of Secret Stairs: A Walking Guide to Los Angeles by Charles Fleming.  The book was published by Santa Monica Press in 2010.