Entering an intersection on a solid green light is appropriate when you can cross the intersection before the light turns red. A solid green light indicates that you have the right of way to proceed, but it's essential to assess the situation to ensure that it is safe to do so.
When approaching the intersection, you should evaluate the traffic and ensure that no vehicles are in your way, and that you have enough time to clear the intersection fully before the light changes. This means checking for oncoming traffic and any other potential hazards. Being prepared to stop if necessary and ensuring you can safely clear the intersection helps prevent accidents and keeps traffic flowing smoothly.
Other factors, such as the presence of pedestrians or the state of traffic signals, can influence your decision, but the core requirement is the ability to safely navigate the intersection in the time allotted by the green light.