The traffic sign "Tourist information river or canal" is used to indicate the presence of tourist information related to rivers or canals in the area. This sign is particularly helpful for travelers and tourists who may be interested in recreational activities such as boating, fishing, or simply enjoying the scenic views along these waterways.

In Germany, this sign serves to guide tourists to places where they can find information about tours, activities, and resources related to the river or canal, including visitor centers, guided tours, and local attractions. It is important for drivers to be aware of such signs as they may lead to areas with increased pedestrian activity or specific tourist facilities.

If you have further questions about related driving rules or other traffic signs, feel free to ask!