Interstate 17
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Interstate 17 (I-17) is a north–south Interstate Highway entirely within the US state of Arizona. I-17's southern terminus lies in Phoenix, at I-10/US 60 and its northern terminus is in Flagstaff, at Milton Road north of I-40.
"The Stack", intersection of I-10 and I-17. Looking north up I-17, downtown Phoenix.
Southern terminus at I-10 in Phoenix
View of the Red Rocks of Sedona from I-17, just south of Munds Park
I-17 near Flagstaff
Frontage road
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A frontage road is a local road running parallel to a higher-speed, limited-access road. A frontage road is often used to provide access to private driveways, shops, houses, industries or farms. Where parallel high-speed roads are provided as part of a major highway, these are also known as local lanes. Sometimes a similar arrangement is used for city roads; for example, the collector portion of Commonwealth Avenue in Boston, Massachusetts, is known as a carriage road.
A frontage road for I-49/US 71 (a freeway) near Carthage, Missouri. The frontage road (called an "outer road" in Missouri) is former U.S. Route 71 Alternate. A second frontage road on the opposite side of the freeway is visible and was built during construction of the freeway.
Service Lane on Bangalore elevated tollway on Tumkur Road, Bangalore.
New Jersey Route 3, westbound in Secaucus. A service road is visible on the far right.
A frontage road for Texas State Highway 183 (Airport Freeway) in Irving, Texas