should be located, designed, and constructed to provide the needed traffic
capacity with qualities admitting movement of the traffic at fast speeds with
: minimum interference from highway entering-and-leaving vehicles. On important
ly, routes this often means control of access and use of curves (horizontal and
"Obs vertical) that are smooth, easy, and long in combination with joining tangents
x of appropriate length. It is good practice to make the surveys, to accomplish
all engineering, and to procure rights-of-way of sufficient width, particu-
larly for the important highways, which will accomodate the ultimate number of
traffic lanes that may be required, although immediate construction to fulfill
current and anticipated future traffic needs for the next decade or more
require only 2 or 4 lanes.
me
A A low oblique view of & cloverleaf interchange on controlled access highway
bordering a residential area. On the right is an improved and slope-protected
drainage channel.