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
No-impeachment rule the law of 42 jurisdictions. The Iowa rule has been adopted in 9 jurisdictions. The United States Supreme Court created a racial bias exception to the rule in their decision in "Peña-Rodriguez v. Colorado" (2017). No-impeachment rule The no-impeachment rule (also known as the non-impeachment rule) is a rule in the procedural law of many jurisdictions. It says testimony from jurors about what occurred during jury deliberations may not be used to impeach a verdict during an appeal. The rule originated in common law and has been codified into statute in many jurisdictions. The United States Federal Rules of Evidence,