Bridge number 4 (Brug Vier) Heibrug. Another standard fixed bridge in the centre of Amsterdam. Along with bridges 1 and 2 this bridge spans the Singel and forms the connection between the Heisteeg (towards the center) and Wijde Heisteeg (towards the west). Hei or Hay in English is likely named along with both alleys after ‘t Hayblok, a corner house here.
https://nl.wikipedia.org/wiki/Heibrug