Our 21st bridge in the series documenting the 65 Long Island Motor Parkway bridges is the "parkway bridge" over Willis Avenue in Williston Park. Thanks to Bob and Ruth Valentine for providing the only known existing photo of the bridge.
More information on the Willis Avenue Motor Parkway Bridge is posted on VanderbiltCupRaces.com.
Link to documentation on 21 of the 65 Motor Parkway Bridges.
Link to the history of the Long Island Motor Parkway.