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
Memorial Drive (Houston) ramps at Shepherd Drive. Motorists can enter Memorial Drive from northbound (by way of the I-45 northbound/Pease Street distributor ramp) or southbound Houston Avenue, Prairie Street, and Capitol Street. Motorists exit either to I-45 southbound and Pierce, Jefferson and Bagby Streets (by way of the Heiner Street distributor elevated ramp), Rusk Street, or Texas Avenue. Most of this parkway is three lanes in each direction. This section of Memorial Drive hugs the north bank of Buffalo Bayou, crossing over it twice near Glenwood Cemetery, while Allen Parkway follows the south bank of the Bayou. There are continuous bike paths and