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The bridge and torch problem (also known as The Midnight Train [1] and Dangerous crossing [2]) is a logic puzzle that deals with four people, a bridge and a torch. It is in the category of river crossing puzzles , where a number of objects must move across a river, with some constraints.
[2] [better source needed] In late 1953, the Eli Bridge Company road-tested its Scrambler ride, [4] [5] and sold the first five by the end 1954. [5] The original ride had a total of 12 cars distributed among its three arms with a capacity of 24 adults or 36 children. The entire ride rotated clockwise at 9–12 revolutions per minute. [6]
The single-cylinder, 197 cc, Villiers engine was mounted next to the driver (RHD), outside of the body with an external chain-drive to one rear wheel. Access to the interior was via a single door. The steel body had a folding fabric roof, and at £300 it was the cheapest car on the UK market. [3]
It uses the same modular components as the Close Support Bridges. A standard bridge set is carried, launched and recovered from 3 specialist vehicles (1 x Automotive Bridge Launching Equipment (ABLE) and 2 x Bridging Vehicles (BV). Up to 44m of bridge can be built using this system, although only 32m is possible with the 3 vehicle combination.
The unique shape of a multi-way bridge makes it easy to identify from an airplane. Pilot Amelia Earhart described Zanesville, Ohio as "the most recognizable city in the country" because of its Y-shaped bridge, [2] and the pilots of Enola Gay aimed for Hiroshima's T-shaped Aioi Bridge when they dropped the atom bomb. [3]
The parkway was completed in 1978 [1] and crosses the northern portion of Mobile Bay, running roughly parallel to the nearby Battleship Parkway, [2] with which it has an interchange. It was named for the jubilee phenomenon that occurs intermittently in Mobile Bay, but is commonly referred to locally and in the media as the "Bayway". [3]
A R1-million video-camera surveillance system, paid for by private donors, was installed in August 2005. [2] Gauteng journalist, Franz Kemp, raised the funds after his daughter Inge had jumped off the bridge in 2003. [3] The local police and pedestrians have rescued some twenty people from jumping off since that time. [4]
One of the world's most heavily used pedestrian scrambles, the Shibuya Crossing at HachikÅ Square in Tokyo. A pedestrian scramble (or exclusive pedestrian interval) is a type of traffic signal movement that temporarily stops all vehicular traffic, thereby allowing pedestrians to cross an intersection in every direction, including diagonally, at the same time.