Looking for comments/feedback on a contractor requested design change for the HMA base course on a 12,000 ADT roadway. They want to use a 3/4" mix, instead of the specified 1" mix for the base course.
NYSDOT specifies 1.5" max aggregate for base, 1" max or 3/4" max for binder, and 1/2" max or 3/8" max for top.
Regarding binder, NYSDOT's Comprehensive Pavement manual states "The 25.0 mm size should be used for pavements with 20 year ESAL counts over 10 million.
"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928