Two-second rule two seconds as inadequate, and recommend a three-second rule. German law requires a minimum 0.9 second distance but when tested under relaxed conditions researchers found that their test subjects spent 41% of the test time at following distances under 0.9 second. The United States National Safety Council suggests that a three-second rule—with increases of one second per factor of driving difficulty—is more appropriate. Factors that make driving more difficult include poor lighting conditions (dawn and dusk are the most common); inclement weather (ice, rain, snow, fog, etc.), adverse traffic mix (heavy vehicles, slow vehicles, impaired drivers, pedestrians, bicyclists, etc.), and
Community Rule 30% of the scrolls are classified as "sectarian". The most complete manuscript of the Community Rule was found in Cave 1, and was first called the Manual of Discipline by Millar Burrows. It is now designated 1QS (which stands for : "Cave 1 / Qumran / "Serekh" = 'rule'). Numerous other fragments of this document, containing variant readings, were found in caves 4 and 5 (4QS, 5Q11, 5Q13). Two other documents, known as the Rule of the Congregation (1QSa) and the Rule of the Blessing (1QSb), are found on the same scroll as 1QS and while they were originally thought