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
President's rule obtaining the consent of the President of India. If it is not possible to revoke Governor's rule within six months of imposition, the President's Rule under Article 356 of the Indian Constitution is imposed. There is little practical difference between the two provisions. Following its landmark judgment in the 1994 "Bommai" case, the Supreme Court of India has restricted arbitrary impositions of President's rule. Chhattisgarh and Telangana are the only states where President's rule has yet to be imposed. In practice, president's rule has been imposed under different circumstances: If approved by both houses, President's Rule can continue for 6