At an uncontrolled T intersection, the vehicle on the through street must yield to the vehicle on the terminating street:

At an uncontrolled T intersection, the vehicle on the through street does not need to yield to the vehicle on the terminating street. Instead, it is the responsibility of the vehicle on the terminating street to yield to traffic on the through street. This is based on standard right-of-way rules, which dictate that vehicles must yield to those that have the right of way, typically the ones on more major or continuous roads. The logic here is that vehicles traveling on the through street are often going at higher speeds and are more likely to have a clear path, while those on the terminating street need to be cautious and yield before merging or turning.

Yielding only applies when traffic is present from the through street, and there’s no distinction made based on the size of the vehicles. Thus, vehicles on the terminating street must wait for a safe gap in traffic on the through street before proceeding, ensuring the flow of traffic remains uninterrupted.