Since the opening of the bridge in 1955, much has changed in Rockland
and the neighboring counties. While plans for the physical structures
are being designed and reviewed, we must not forget the human element.
How do these structures impact each of us and our communities?
Interestingly, at the Transportation Summit convened by Rockland
County Legislature Chairwoman Harriet Cornell, on September 30,
2005, the liveliest discussion was driven by a concern for adequate
participation by stakeholders. The span of fifty years has driven
home the point of how land use is influenced by how we get around,
and what moves us. It is evident more than ever that careful, comprehensive
planning be required of all public officials and government employees,
but it is vitally important to have active citizen participation.
The I-287 corridor and Tappan Zee Bridge are a piece of the puzzle
that determines the picture of the regional transit system. The
overflow of a congested highway and over-crowded roads only adds
to the problems of getting about in this area, and increases air
pollution. Improved mass transportation facilities must be developed.
The following outline of comments was prepared by Julius Levine,
a longstanding RCCA board member. Educated at Cooper Union, Julius
spent a career working as an engineer. He has put together some
basic points of interest that consider very tangible realities to
be evaluated for the future of the Tappan Zee Bridge.
1. List the various approaches to be considered
2. Define each approach in great detail.
3. If any approach has variations list them separately as stand
alone options.
4. For each approach, list all the key considerations and potential
problems.
5. Define the projected needs for the bridge system for the next
fifty years.
6. Whichever approach is selected, the design criteria should be
for a hundred years of reliable operation.
Approaches to be considered for each of the repair or replacement
conditions
Current bridge considerations:
1. Maximum design load; static, rolling and environmental, of existing
bridge.
2. Does the design load meet the projected requirements for the
next 50 years?
3. Can the present road surface support the current load requirements?
If not can the present surface be strengthened?
4. Can the present supporting structure support an improved road
bed if needed?
5. If the bridge can’t meet our future needs it should be replaced.
6. If the bridge is to be repaired, the causeway must be replaced.
Repair:
Physical bridge dimensions will remain unchanged.
The current structure may not support a, proposed cantilevered
structure for cars to pull over.
There are many fixes that will provide short time through-traffic
improvements.
For the existing bridge the maximum traffic flow can be modeled.
High speed overhead toll readers can be used to enhance traffic
flow.
NOTE: Significant traffic increase may not be safe with
the existing structure.
Replace:
Option 1: Vehicular traffic only.
1. Define future load requirements; cars, trucks, busses, etc:
2. Specify number of lanes needed to meet future requirements.
3. Specify pullover and emergency support requirements.
4. Know that the new bridge must be completely integrated with
the thruway on both sides of the river before the old bridge is
removed.
5. Consider: After the new bridge has been integrated with the
Thruway and before the old one is removed, there will be two operational
bridges in place. If the old bridge is repaired to carry one- way
traffic and the new bridge is designed to carry all additional amenities,
there is the additional safety of being able to maintain an operational
link if an accident happens on one bridge.
Option 2: Vehicular traffic plus light rail, buss, or other
mass transit system
1. Define the path and type of the mass transit system to be used.
Where does it start, where does it go, and where will the stops
along the route be located.
Each stop will need a station, which will require parking and
other amenities.
2. If mass transit capability is a requirement as part of the
bridge structure, then links with the north, south rail lines will
require additional considerations.
3. The thruway (bridge) and the north-south rail lines intersect
at different elevations requiring stations at each level and handicapped
accessible transport between levels.
4. The replacement bridge must be completed and smoothly interfaced
with the thruway, at both ends, before the existing bridge can be
removed.
5. Property on both sides of the river must be acquired to accommodate
the replacement bridge as well as the staging areas for construction
equipment and material.
NOTE: Turf battles between the Thruway Authority and the MTA
will be harmful to both Rockland and Westchester Counties.


River Crossings

“Man is explicable by nothing less than all his
history”
Ralph Waldo Emerson
Rockland County Conservation Association
Working with the Environment for a Better Future, through
conservation of natural resources, sound land use, clean air and
water, proper drainage energy conservation and preservation of
natural beauty.