Verkkodemonstrations in previous years have rejected the hosting of foreign troops in the philippines.
Protestors have also claimed that the annual exercises will provoke.
Verkkoincreased security, localized disruptions likely.
A few hundred activists affiliated with manibela transport group are demonstrating outside the land transportation.
Verkkoviolent protests broke out in the southern philippine city of davao on sunday as police sought to arrest an evangelical preacher with ties to former leader.