Telephone sign
A public telephone is available at the next exit, or inside the rest area where the sign is posted.
Increasingly rare on new signage since many states have quietly pulled public phones from rest stops, though older overhead panels can still carry it.
How to recognise it
This sign is a square in blue, used only for motorist services. Blue for motorist services such as fuel, food, lodging and hospitals. Brown for parks, recreation and cultural sites. Neither colour is ever used for a rule.
What the test wants you to know
This sign is a leftover from before cell phones, and plenty of state handbooks have never bothered to retire it. What still earns it a place on a test is the color: a driver looking for help after a breakdown is looking for blue, and remembering that the handset sits on the same blue panel as the hospital H is worth more than memorising the symbol itself.
Practise it
Reading about a sign is not the same as recognising it in half a second with an examiner watching. Every state road signs test on this site shows the sign and asks you to name it, then shows four faces and asks you to pick the right one.
Hospital
Rest Area
Gas
Food
Lodging