ATSSA Traffic Control Supervisor Re-certification (missing some basics) Exam Questions And Answers

ATSSA Traffic Control Supervisor Re-certification (missing some basics) Exam Questions And Answers L=(WS²)/60 for 40MPH or less, L=WS for 45MPH or more - ANS Formula for Min. taper length The off peak 85th percentile. Which is the speed at or below which 85% of vehicles travel operating speed in free flow conditions - ANS speed used in formulas should be 125' - ANS Distance of L for 25 MPH with 12' Lane width 245' - ANS Distance of L for 35 MPH with 12' Lane width 540' - ANS Distance of L for 45 MPH with 12' Lane width 660' - ANS Distance of L for 55 MPH with 12' Lane width 780' - ANS Distance of L for 65 MPH 12' Lane width L Minimum - ANS Merging Taper Length 1/2 L Minimum - ANS Shifting Taper Length 1/3 L Minimum - ANS Shoulder Taper Length 50'-100' regardless of speed 6 devices 10'-20' apart - ANS One-Lane, Two-Way Taper (Flagger taper) Length and number of devices 50'-100' per lane - ANS Downstream taper Length 2L - ANS Tangent distance (between tapers) 1/2L - ANS Tangent distance before shifting taper Buffer Space Work Space Traffic Space - ANS Activity Area Sub-components (3) Recovery Area for errant vehicles: Forgiving design Protects workers and Motorists Always completely empty or clear No vehicles, truck-mounted attenuator, equipment, or materials STRONGLY RECOMMENDED: unless there is a documented reason not to - ANS Longitudinal Buffer Space Where road users are returned to their normal path extends from the downstream end of the work area to the last device such as end work zone sign May contain: end work zone sign: usually 500' past last device downstream taper = 50'-100' per lane - ANS Termination Area is: can contain: (2) 100' - ANS Recommended Advanced Warning Sign Spaceing: Urban (low speed) 350' - ANS Recommended Advanced Warning Sign Spaceing: urban (high speed) 500' - ANS Recommended Advanced Warning Sign Spaceing: Rural 1000', 1500', and 2640' - ANS Recommended Advanced Warning Sign Spaceing: freeways and expressways (3) 1 Mile 50% shoulder at beginning of taper if possible, if not, as close to beginning as possible inside taper. - ANS Arrow board visibility distance by design: night time dimming: location: taper: not to exceed distance in feet = to posted speed limit tangent: distance = double posted speed limit - ANS device spacing taper: tangent: A: Low intensity flashing B: High-intensity flashing C: Steady Burn D: 360° steady burn - ANS Warning lights types: Type A: Type B: