The address is only one part of the answer.
A restaurant’s address is usually a reasonable place to begin. A food truck can serve at different sites, take part in an event, pause between periods or finish early. A pin on a map describes a position. By itself, it does not tell you that somebody is ready to serve at that position today.
Before committing to the journey, read the truck’s current public state, its published menu and any relevant service information. This is especially useful when you are making a trip specifically for one dish. The best plan is one that can survive a little new information.
Hours are a plan. Live now is what’s happening.
Opening hours describe the usual week. Live now means the truck started its shift and is sharing where it is parked. The two work together, but one never stands in for the other: last week’s schedule can’t tell you where tonight’s service is.
Laff takes the directions away when a truck pauses or closes, or when its live location goes stale. Now and then that means less on screen, which beats sending you confidently to an old spot.
Give yourself one useful alternative.
Read a second published menu or save another place you want to try. An alternative need not turn a relaxed outing into a spreadsheet. It simply means that a sold-out item or an early close does not have to decide the rest of the evening.
An empty live result is also information. Browse published profiles, check back later or change the plan. A useful discovery service should be willing to say that it cannot currently confirm a serving truck instead of filling the map with guesses.
A quick check before leaving.
Open the current truck page, read the state, inspect the menu and check that the dish information answers your important questions. If a dietary requirement needs clarification, ask the operator. Then use directions, which show only while the truck’s location is confirmed.