What side of the street were the marchers allowed to march in the civil rights movement of 1968

They were allowed to march in Beale Street in the Civil Rights Movement of 1968.

Explanation:

The Civil Rights Movement of 1968 was a protest in which hundreds of blacks marched from Selma to Montgomery. The purpose of this protest was to avail right to vote for blacks.

The protest was organized by non-violent protesters desiring to exercise their constitutional right to vote.

When protesters left Selma and marched on the highway, they were opposed  by the policemen blocking their way. But after President's address, they were allowed to march to Montgomery. They were allowed to march in Beale Street.