In celebration of the Mayor's Office of Transportation and Utilities (MOTU) fifth anniversary, the Free Library of Philadelphia has partnered with MOTU to showcase a select history of Philadelphia's transportation networks. Visit the Free Library of Philadelphia's Parkway Central Library or visit MOTU online to see these snapshots of Philadelphia's transportation and utilities history; learn more about hot air balloon races and the Broad Street Station fire; and see the faces of the men who built the El and the machines they used. Curated by the Planners of the Mayor's Office of Transportation and Utilities.