From the U.S. Embassy in Panama:
The U.S. Embassy in Panama alerts U.S. citizens that protestors have completely closed via Transistmica near the University of Panama in Panama City. Clashes between protestors and police are reported. Expect heavy traffic delays in the area.
For up-to-date information on security, Americans traveling abroad should regularly monitor the Department’s Internet web site at http://travel.state.gov. Further information on safety and security can also be obtained by calling 1-888-407-4747 toll-free in the United States and Canada or on a regular toll line at 1-202-501-4444. These numbers are available from 8:00 a.m. to 8:00 p.m. Eastern Daylight Time, Monday through Friday (except U.S. federal holidays).