Merriweather has a curfew of 11pm at all times.
Since this is sold out, here's how to avoid the traffic...
Take 29 to 32 towards Clarksville.
Exit at the Sanner Road/Cedar Lane exit.
Take a right onto Cedar Lane
Follow Cedar Lane to Little Patuxent Parkway and take a Right. This will take you straight to Merriweather/the mall.
Option B:
From Cedar Lane, take a right onto Hickory Ridge Road.
Take a left onto Brokenland Parkway at the light
Take a right onto little patuxent parkway (you will be right there)
If you're coming from the North, you can do this as well. Just drive past the merriweather exit and the brokenland parkway exit.
The traffic was a mess last week for that other sold out concert of that band I've never heard of.