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- IMSA Journal - March/April 2010
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One of the first traffic-actuated signals detected a car’s presence via sound.
Fact - Charles Adler, Jr. developed and installed a sound activated, traffic-actuated traffic signal. Drivers stopped their cars in front of microphones mounted to poles at intersections and honked. The microphone registered the sonic vibration of the honk and changed the light, permitting the driver to safely cross the intersection. The first horn-actuated light was installed in Baltimore, MD. The more common traffic-actuated detector that senses vehicular presence based on pressure was also developed around the same time and proved more successful.
- IMSA Journal - Jan/Feb 2010
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Computers were first used for traffic control in the State of California in 1964.
False - Analog computer control systems were employed in Denver, CO beginning in 1952. IBM did work with the City of San Jose in 1964 to further develop a digital computer traffic control system. The IBM 1710 Control System utilized information collected from over 400 underground sensing devices to track the number of vehicles, their speed, which lanes they occupy, the number and duration of stops, and the number of vehicles that pass a given intersection during each cycle.
- ITE Journal - March 2010
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One of the first traffic-actuated signals detected a car’s presence via sound.
Fact - Charles Adler, Jr. developed and installed a sound activated, traffic-actuated traffic signal. Drivers stopped their cars in front of microphones mounted to poles at intersections and honked. The microphone registered the sonic vibration of the honk and changed the light, permitting the driver to safely cross the intersection. The first horn-actuated light was installed in Baltimore, MD. The more common traffic-actuated detector that senses vehicular presence based on pressure was also developed around the same time and proved more successful.
- ITE Journal - Feb 2010
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Less than ½ of signalized intersections in major U.S. metropolitan areas operate under centralized control.
False - 54% of signalized intersections in the country’s major metropolitan areas operate under centralized computer control. Centralized computer control in the U.S. was spearheaded by the Bureau of Public Roads, now known as the Federal Highway Administration (FHWA), in 1967 through the Urban Traffic Control System (UTCS) Project. By 1972, UTCS controlled 512 vehicle detectors that determined signal timing at 113 intersections. The 1970’s experienced expansive growth in the development of software-based computer traffic control systems across the globe.
- ITE Journal - Jan 2010
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Computers were first used for traffic control in the State of California in 1964
False - Analog computer control systems were employed in Denver, CO beginning in 1952. IBM did work with the City of San Jose in 1964 to further develop a digital computer traffic control system. The IBM 1710 Control System utilized information collected from over 400 underground sensing devices to track the number of vehicles, their speed, which lanes they occupy, the number and duration of stops, and the number of vehicles that pass a given intersection during each cycle.
- Parking Today - Feb 2010
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The world's largest parking garage/structure resides in Canada.
True - Though this topic is widely debated. For now, the West Edmonton Mall in Alberta Canada. With 20,000 spaces in its wrap-around parking structure, West Edmonton holds the Guinness world record for the largest parking lot. Some argue that the mall's garage-lot hybrid shouldn't count as a single unit. If that was the case, then Seattle's airport garage in the United States the winner with 13,000 spaces under a single roof.