Bridge Clearances: Problems in Northeastern United States

The development of transportation in the northeastern United States, particularly in New England and in New York State, indicates the importance of navigation in the area as a whole and illustrates the role of navigation clearances in the integration of several transportation media. Specific examples are given of marine architecture adopted to minimum clearances, and other examples are cited in which regulation could benefit the public. The ineffectiveness of zoning in view of the present concept of navigation rights is illustrated. Clearance is a problem wherever navigation and land transport exist, and there is a need for a more complete study of all waterways and watercraft leading to a determination of clearances and navigability.