Are different routes flown at night than by day?

Yes. Only the aircraft that take off from the Polder runway follow a special night-time departure route at night, heading North after the take-off before turning South or South-East. These routes were designed to avoid the high population concentrations around Amsterdam or to fly across them at the highest altitudes possible. This leads to less noise pollution at night. A number of special departure procedures also apply for the Kaag runway at night, in a north-easterly direction. The use of these night-time departure routes is only possible when air traffic levels are low. As a result, these night-time routes cannot be used during the day.