Which class of airspace is not mentioned for traffic information aiding collision avoidance?

Class E airspace is primarily used for en route traffic and generally consists of airspace outside the controlled environments of Classes A, B, C, and D. It may not always require separation services like the other controlled classes, which is why it is less focused on providing specific traffic information aimed at collision avoidance.

Classes A, B, C, and D involve more structured traffic management and stricter communication protocols with air traffic control, which directly support collision avoidance efforts. In contrast, Class E airspace, while it does have certain requirements for visibility and cloud clearances, does not necessitate the same level of traffic advisories as the other classes. This distinction makes Class E less relevant when discussing traffic information that aids in collision avoidance efforts in controlled airspace.