Highway safety corridor signing and enforcement program
Michael Babusci, Pennsylvania. Dept. of Transportation. Bureau of Planning and Research, Parsons, Brinckerhoff, Quade & Douglas
Pennsylvania Dept. of Transportation, 2006 - Health & Fitness
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2-Axle 3 Axle 6-Axle Not Bikes 999 mph Total 999 sec Total Axle 4-Axle 5-Axle Bikes Trailers Long Buses 6 Tire Classiﬁcations for Complete Complete 24-hour Periods CONFIDENCE INTERVALS conﬁdence level Count Complete Count Okay Daily Machine Counts Data for Complete DESIGNATION OF CONFIDENCE difference in proportions Double Double Double Double Double Multi Double Multi Multi Enforcement Area Friday Monday Gap Data Greensburg Harrisburg Highway Safety Corridor Hypothesis Testing Initial Set Interstate 81 INTERVALS AND ASSESSMENT Mid-Stream Location mph 51 mph mph 71 mph mph to 55 Multi Classiﬁed Total Multi Multi Classiﬁed Multi Multi Multi Number of vehicles PENNDOT SAFE CORRIDOR Percentage of vehicles Periods on Weekdays Pickup SAFE CORRIDOR STUDY Safety Corridor Evaluation sample delta Scranton sec 25 sec sec 9 sec to 26 Serial Shoulder Side Lane Single Double Double Single Single Double Speed Limit Tire Single Single TOTALS AGE Trailers Long Buses valid comparison vehicles traveling