Golden Gate Bridge wanted it to be painted with black and yellow stripes to ensure visibility by passing ships. Senior engineer Charles Alton Ellis, collaborating remotely with Moisseiff, was the principal engineer of the project. Moisseiff produced the basic structural design, introducing his "deflection theory" by which a thin, flexible roadway would flex in the wind, greatly reducing stress by transmitting forces via suspension cables to the bridge towers. Although the Golden Gate Bridge design has proved sound, a later Moisseiff design, the original Tacoma Narrows Bridge, collapsed in a strong windstorm soon after it was completed, because of an unexpected aeroelastic flutter.
Hell Gate Bridge the bridges are more than long. The Tyne Bridge in Newcastle, England, and the Sydney Harbour Bridge in New South Wales, Australia, derived their own designs from the Hell Gate Bridge. The Sydney Harbour Bridge, however, is about 60% larger than the Hell Gate Bridge. The bridge was conceived in the early 1900s to link New York and the Pennsylvania Railroad (PRR) with New England and the New York, New Haven, and Hartford Railroad (NH). In June 1906, the NH applied for and received a franchise to operate trains from the northeastern suburbs of New York City to Pennsylvania Station