Adriver is traveling at 90 mi/h down a 3% grade on good, wet pavement. an accident investigation team noted that braking skid marks started 410 ft before a parked car was hit at an estimated 45 mi/h. gnoring air resistance, and using theoretical stopping distance, what was the braking efficiency of the car? (mannering 53) mannering, fred l., scott washburn. principles of highway engineering and traffic, 6th edition. wiley, 2016- 09-15. vitalbook file. the citation provided is a guideline. check each citation for accuracy before use. (ans: 8896; hint for fri, use average speed)