Once again, this is very important and is almost always asked on the written exam. Remember: 1  With the service brake depressed, the air loss rate should be less than 3 psi in 1 minute for single vehicles.  With the service brake depressed, the air loss rate should be less than 4 psi in 1 minute for combination vehicles.
Curfews are also challenged on constitutional grounds. The first youth curfew was adopted by Omaha, Nebraska in 1880. Chicago, the nationâs largest city with a curfew, passed its law in 1955. By 1960, 60 of the 110 US cities with a population over 100,000 had curfews. Thirty years later, 200 US cities had a population over 100,000, and 150 of these cities had curfews.
These Jim Crow laws followed the 1800â1866 Black Codes, which had previously restricted the civil rights and civil liberties of African Americans. Segregation of public (state-sponsored) schools was declared unconstitutional by the Supreme Court of the United States in 1954 in Brown v. Board of Education.im Crow laws were state and local laws enforcing racial segregation in the Southern United States. Enacted after the Reconstruction period, these laws continued in force until 1965.