This is a missile on a trailer. In a fixed situation, such as SF-88 and most sites, the trailers were not present.
Bud Halsey explains
So, how did this affect the launcher? All launchers (even the ones at SF-88L) had the capability of being moved and then set up to fire at another place. To do this, the 7-ton launcher would be fitted out with an axle, driving lights, brakes, towing pintle, outriggers and a portable blast deflector, and it would be towed behind a 5-ton truck as a "trailer" and driven to its field firing position. It would be placed on the ground, outriggers extended, storage and handling rails attached, and the ready missile transporter would off-load a missile onto it. From there on, the firing procedures would be about the same as the semi-fixed position's procedures.
The TO&E (Table of organization and equipment) called for all Nike firing batteries to have the trucks, axles and other equipment to make the launcher "portable"; however, most units in the semi-fixed positions around the defense areas operated on a MTO&E (modified table of organization and equipment) that excluded the axles, etc. "
John E. Pratt (firstname.lastname@example.org) explains -
I suppose that one COULD rig up a
Hercules to launch a bird one time from a launcher provided that all of the
fire controls could be in proper settings - But it would be a party
that you would not want to be invited to. The trailer parts are not
designed to take the heat of the boosters, and I doubt if the system
would function again. In short that is why they developed the Pershing
missile. We called it the "shoot and scoot" The trailer is really just
designed to be a big appliance dolly. Pratt..."