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  2. Friends Select School - Wikipedia

    en.wikipedia.org/wiki/Friends_Select_School

    Friends Select School (FSS) is a college-preparatory, Quaker school for pre-kindergarten through 12th grade located at 1651 Benjamin Franklin Parkway at the intersection of Cherry and N. 17th Streets in Center City Philadelphia. Quaker education in Philadelphia dates back to 1689. Friends Select, which was founded in 1833, has been located on ...

  3. Gridlock - Wikipedia

    en.wikipedia.org/wiki/Gridlock

    Gridlock on a network of two-way streets. The red cars are those causing the gridlock by stopping in the middle of the intersection. Gridlock is a form of traffic congestion where continuous queues of vehicles block an entire network of intersecting streets, bringing traffic in all directions to a complete standstill.

  4. Rules for traffic lights - Wikipedia

    en.wikipedia.org/wiki/Rules_for_traffic_lights

    In some jurisdictions (such as New York City), [citation needed] there are ordinances or by-laws against "gridlocking".A motorist entering an intersection (even if on a green light) but unable to proceed and who gets stranded in the intersection (when traffic ahead fails to proceed), and who remains after the light turns red (thus blocking traffic from other directions) may be cited.

  5. At a marathon the planners have a course maximum of 26 miles; a motorcycle ride would cover that while just getting warmed up. For most rides, a group ride organizer isn’t going to be applying ...

  6. Blocking (statistics) - Wikipedia

    en.wikipedia.org/wiki/Blocking_(statistics)

    Let X 1 be dosage "level" and X 2 be the blocking factor furnace run. Then the experiment can be described as follows: k = 2 factors (1 primary factor X 1 and 1 blocking factor X 2) L 1 = 4 levels of factor X 1 L 2 = 3 levels of factor X 2 n = 1 replication per cell N = L 1 * L 2 = 4 * 3 = 12 runs. Before randomization, the design trials look like:

  7. Box junction - Wikipedia

    en.wikipedia.org/wiki/Box_junction

    A box junction in London, pictured from atop the Monument in 1969. A box junction is a road traffic control measure designed to prevent congestion and gridlock at junctions.The surface of the junction is typically marked with a yellow criss-cross grid of diagonal painted lines (or only two lines crossing each other in the box), and vehicles may not enter the area so marked unless their exit ...

  8. Blocking set - Wikipedia

    en.wikipedia.org/wiki/Blocking_set

    Theorem: In PG(2,q) with q even, there exists a projective triad of side (q + 2)/2 which is a blocking set of size (3q + 2)/2. [3] The construction is similar to the above, but since the field is of characteristic 2, squares and non-squares need to be replaced by elements of absolute trace 0 and absolute trace 1. Specifically, let C = (0,0,1).

  9. Collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Collision_avoidance_system

    The warning is followed by light braking to get the driver's attention. The third phase initiates autonomous partial braking at a rate of 3 m/s 2 (9.8 ft/s 2). The fourth phase increases braking to 5 m/s 2 (16.4 ft/s 2) followed by automatic full braking power, roughly half a second before projected impact. "Pre sense rear", is designed to ...