In Delaware, a highway sign with a blue background generally identifies:
Correct answer: A – Road-user services
Blue backgrounds are used for road-user service signs. These signs direct travelers to services and facilities rather than warning of construction or general roadway hazards. Orange is associated with temporary traffic control, while yellow is commonly used for warning signs.
Source: 2 DE Admin. Code 2402, Part 2, Table 2A-5 — Common Uses of Sign Colors


