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Silver Alert is a public notification system in the United States to broadcast information about missing persons – especially senior citizens with Alzheimer's disease, dementia, or other mental disabilities – in order to aid in locating them. Silver Alerts use a wide array of media outlets – such as commercial radio stations, television ...
The bridge is decorative, featuring ornamental street lights. As part of the MD 139 project, the interchange was reconstructed, and the traffic circle at the MD 139/I-695 ramps was removed and replaced with a traffic signal. [34] This project cost $50 million (equivalent to $69 million in 2023 [27]) and was completed in 2012. [33]
Transportation Safety. Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer. He is most known for developing devices meant to improve transportation safety, including sonically actuated traffic lights, colorblind road signals, pedestrian push-buttons, and flashing aircraft lights.
Maryland has a unitary system of numbered state highways with numbers between 2 and 999. The longest Maryland state highway is Maryland Route 2, while several state highways are less than 0.5 mi (0.80 km) in length. Most of the shortest highways are unsigned. Several state highways have multiple disjoint segments that are denoted internally by ...
Travelers' information station. A travelers' information station (TIS), also called highway advisory radio (HAR) by the United States Department of Transportation, is a licensed low-powered non-commercial radio station, used to broadcast information to the general public, including for motorists regarding travel, destinations of interest, and ...
The Maryland State Highway Administration (MDSHA, MDOT SHA, or simply SHA) is the state mode responsible for maintaining Maryland 's numbered highways [1] outside Baltimore. [2] Formed originally under authority of the General Assembly of Maryland in 1908 as the State Roads Commission (SRC), under the direction of the executive branch of state ...
The bridge, named for the first governor of Maryland, Thomas Johnson, saw construction start in 1972 and opened to traffic on December 17, 1977. The bridge, carrying an average of 33,000 vehicles a day on Maryland Route 4 (MD 4), is one of two crossings of the Patuxent River in Southern Maryland (the other is the Benedict Bridge approximately ...
Maryland Route 97 (MD 97) is a state highway in the U.S. state of Maryland. The route runs 55.27 mi (88.95 km) from U.S. Route 29 (US 29) in Silver Spring, Montgomery County, north to the Pennsylvania border in Carroll County, where the road continues into that state as Pennsylvania Route 97 (PA 97). Throughout most of Montgomery County, MD 97 ...