Final answer:
Gridlock is when you proceed to cross an intersection during heavy traffic and do not have enough space, causing vehicles to be stuck and causing congestion.
Step-by-step explanation:
When you proceed to cross an intersection during heavy traffic and do not have enough space, it is called gridlock.
Gridlock occurs when vehicles are stuck in an intersection because they cannot move forward due to lack of space, often causing traffic congestion. It happens when drivers enter an intersection without ensuring that there is enough space for their vehicle on the other side, which can lead to a standstill.
To avoid gridlock, it is important to wait for sufficient space before entering an intersection during heavy traffic.