A median barrier is a concrete curb or island that is located on the centerline of a street and continues through the street's intersection with a given cross street. Median barriers prevent left turns from the through street and left turns and through moves from the cross street. Medians may not significantly affect curbside parking opportunities, but sometimes parking would be prohibited to accommodate the remaining turning movements or to make room for a wider median barrier. Median barriers would prevent transit service on the blocked street. The turn restrictions imposed by a median barrier would apply to emergency vehicles and are not typically used to block a primary fire response route.
Median barriers apply to all drivers, including local residents.
Very special care must be taken to consider the availability, capacity, and appropriateness of the alternative routes drivers might use if a semi-diverter is constructed. Provision should be made to make median barriers passable for pedestrians and bicyclists. SE 20th at Harrison Street. SE 20th at Ankeny Street.