what is meant by this term you used just now?
A road that is either "numbered" or "maintained" by a sub-national state or province
State highway
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either "numbered" or "maintained" by a sub-national state or province
where is washington state route 544 situated? Northern Whatcom County, Washington, United State which places does it connects? SR 539 near Lynden to Everson and a junction with SR 9 in Nooksack when was it opened? 1930s is this a highway? Yes. A state highway
wiki:4730606
State highway [SEP] Introduction
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either "numbered" or "maintained" by a sub-national state or province. A road numbered by a state or province falls below numbered national highways (Canada being a notable exception to this rule) in the hierarchy (route numbers are used to aid navigation, and may or may not indicate ownership or maintenance). Roads maintained by a state or province include both nationally numbered highways and un-numbered state highways. Depending on the state, "state highway" may be used for one meaning and "state road" or "state route" for the other.