The article discusses how to prevent cracking and leaking in precast concrete bridge deck panels. By using a special method, the researchers figured out the right amount of initial pressure needed to keep the panels strong. For single span bridges, 200 to 300 pounds per square inch is enough. For three-span bridges, it's 200 to 700 psi, and for two-span bridges, it's 100 psi. They also found that when building bridges quickly, the initial pressure needs to be increased a lot.