How does crossing a movable bridge work?
The Netherlands has more than 1500 movable bridges. What rules do you have to observe when passing, when do you have to wait, what do the lights mean and how do you ensure that the bridge keeper notices you?
All about the Prins Willem Alexanderbrug, Koog aan de Zaan, location, opening hours and contact details. On the water map below do you see the bridge in its immediate vicinity. On the right on this page you will find the operating times of this bridge, if available the maritime radio data and telephone numbers, and any additional instructions.
 
Open the Water Map for Koog aan de Zaan in full window
The Netherlands has more than 1500 movable bridges. What rules do you have to observe when passing, when do you have to wait, what do the lights mean and how do you ensure that the bridge keeper notices you?
| Vertical clearance when closed 3.13 meter | Width 14.21 meter |
| VHF-Channel 20 | Phone number 075-6816521 |
Currently the bridge is CLOSED
Planned openings
Thursday: 01:01 until 01:07 (Planned)
Thursday: 01:35 until 01:41 (Planned)
Thursday: 02:08 until 02:14 (Planned)
Thursday: 02:52 until 02:58 (Planned)
Thursday: 04:05 until 04:11 (Planned)
From 01-01 until 31-03
Holidays: closedFrom 01-04 until 04-05
Working days: between 06:00 and 22:00From 05-05 until 13-05
Working days and Holidays: between 06:00 and 22:00From 14-05 until 31-10
Working days: between 06:00 and 22:00From 01-11 until 23-12
Holidays: closedOn 24-12
All days: between 06:00 and 16:00From 25-12 until 30-12
Holidays: closedOn 31-12
All days: between 06:00 and 16:00
Administrator visiting address
Stadhuisplein 100 Zaandam
Phone number: 075-6816888
Data updated: 21 Oktober 2026, 13:20 uur
Klopt er iets niet? Meld het de Vaarmelder.