Section 316 is the lower part of the upper deck and shares a concourse tunnel with section 416. As you exit your seats towards the concourse, a men's restroom and family restroom can be found just to your right. A women's restroom is also found two sections to the right (at the tunnel for sections 314/414).
When you're on the lower level entering the ballpark, an elevator can be found near sections 110 and 111. This will bring you up to section 311 where you would then walk over to section 316. Please note that the elevators are reserved for disabled guests and those with mobility issues.