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
Storrow Drive 1 is now routed concurrently along Interstate 93. The parkway is named for James J. Storrow, an investment banker who led a campaign to create the Charles River Basin and preserve and improve the riverbanks as a public park. He had never advocated a parkway beside the river, and his widow publicly opposed it. The road is notorious for speeding and aggressive driving because police enforcement along the road is difficult without a breakdown lane. Radio traffic reports have warned motorists about "ponding" on Storrow Drive, which occurs when snow and frozen ground prevent water from draining properly into storm