Road signs in Singapore amber beacons, and are valid yet uncommon on the roads. The road markings and road dividers are "white zig zag lines" that indicate a zebra crossing in the vicinity, similar to the United Kingdom and Republic of Ireland Zebra crossing rules. On approach, regardless of the absence of any pedestrians, all motorists are required to keep left of the divider, prepare to stop and stay in their respective lanes, i.e. no overtaking is permitted. When pedestrians are present at the side of a zebra crossing, all motorists are obligated to give priority to pedestrians crossing the zebra crossing bars, by
Frontage road Minnesota Drive Expressway (from West 100th Ave to Dimond Boulevard) in South Anchorage. Also, the George Parks Highway (Alaska Route 3) has two-way frontage roads running along it from the Trunk Road exit to the Seward Meridian Parkway exit (Fireweed Road on the south side and Blue Lupine Drive on the north side) in Wasilla. Frontage roads are not very common in Arizona but do exist along certain freeways. I-17 Black Canyon Hwy./Maricopa Fwy. is the oldest freeway in the Phoenix Metropolitan area to have a frontage road. Some sections of the frontage road was reduced to a single lane