An Initial Investigation of the Effects of a Fully Automated Vehicle Fleet on Geometric Design

Table 1

Development of SSD model [27].

Source (Author/year)	PRT (sec)	Sight distance (feet)
Agg, 1916		At least 250
Agg, 1924		400
Michigan, 1926		500
Oregon, 1935	0.5	1,500 @ 80 mph
Wiley, 1935		600
Ohio, 1937		1,000 (two lanes)
		800 (four lanes)
Conner, 1937		500 (four lanes)
HRB, 1937	3
Bateman, 1939		800 (Horiz C)
Agg, 1940	<1
AASHO, 1940	3 @ 30 mph	200 @ 30 mph
	2 @ 70 mph	600 @ 70 mph
AASHO, 1954	2.5
AASHO, 1965	2.5
AASHTO, 1970	2.5
AASHTO, 1984	2.5	200 @ 30 mph
		850 @ 70 mph
NCHRP, 1984	2.5