_____ is assigned to traffic and transportation information.

The designation associated with traffic and transportation information is 511. This number is specifically established to provide drivers and the public with access to real-time information regarding road conditions, traffic delays, and other pertinent transportation-related updates. It serves as a vital resource for travelers seeking immediate and relevant information to make informed decisions about their routes.

In contrast, other numbers have different purposes: 911 is typically reserved for emergency services, allowing citizens to reach police, fire, or emergency medical services in crisis situations. The number 711 is designated for telecommunications relay services, facilitating communication for individuals who are deaf, hard of hearing, or have speech disabilities. On the other hand, 411 is most commonly used to access local directory assistance for phone numbers and addresses. Thus, B is the correct choice for access to traffic and transportation information.