The access requirements of most commercial developments can be served by driveways
having standard design characteristics. The exceptions are driveways having high traffic
volumes, those being used by large vehicles, or those serving businesses that engender
unique traffic patterns. For standard commercial drive designs, see Fig. 2.56. The recommended
radii are (1) 15 ft (4.6 m) minimum, when the through highway is curbed, and
(2) 25 ft (7.6 m) minimum, when the through highway is uncurbed. The maximum
width is 35 ft (11 m). A dropped curb should be used on curbed streets as shown in
section B-B in Fig. 2.50.