The sign "Start of a bike street" indicates the beginning of a designated bike lane or bike street. In areas with this sign, bicycles have priority over motor vehicles, and the road is primarily meant for cyclists. Motor vehicle traffic may be allowed but is usually limited, and drivers must be especially cautious and accommodating to cyclists.
These streets often have specific regulations, like lower speed limits for cars, and may also feature additional bike-related signage. When you see this sign, it’s important to be aware of increased bicycle traffic and to yield to cyclists when necessary.