(a) The contractor installing a specific information logo sign shall place the sign so that:
(1) the sign is at least 800 feet from the previous interchange and at least 800 feet from the exit direction sign at the interchange from which the services are available;
(2) two signs having the same legend are at least 800 feet apart, but are not excessively spaced; and
(3) a motorist, after following the sign, can conveniently reenter the highway and continue in the original direction of travel.
(b) A specific information logo sign that is placed along a ramp or at a ramp terminal must be a duplicate of the corresponding establishment logo sign, except that the ramp sign must:
(1) be smaller;
(2) include the distance to the commercial establishment; and
(3) include directional arrows instead of directions shown in words.
(c) If the service facilities are not visible from an interchange ramp terminal, additional signs may be placed along the ramp or at the ramp terminal.