BIDDEFORD — Visitors to Biddeford’s downtown may experience delays in the Main Street on Monday as a result of landscaping work in progress.

City workers will be pruning trees on Main Street from Elm Street to Jefferson Street on the west side of the street.

Parking will be prohibited in this section of Main Street from 7 a.m. until 4 p.m. Monday, or until all of the pruning has been wrapped up.

Further pruning of trees on Main Street in Biddeford will be completed in phases layer this summer to lessen the impact on parking there.

According to guidelines established by the American National Standards Institute for the Tree Care Industry Association, pruning for future growth is necessary for trees as lower branches are permanently established.

Arborists recommend that trees should be pruned to keep lower limbs out of the way of pedestrians and vehicles on city streets.

They say that once branches are established on a tree, they do not move upward on the tree as the tree grows. Thus, branches 6 feet above the ground will always be 6 feet above the ground.

ASNI standards also recommend that branches farther up on the tree should be evenly spaced up the trunk wherever possible and removal of limbs that cross others, or those limbs that may excessively extend beyond the natural crown of the tree.