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176 Concord Street, P.O. Box 22287, Charleston, SC 29413-2287
Contact: Erin Dhand, Manager, Corporate Communications and Community Affairs
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Port Releases Traffic Study

A detailed 20-year traffic study shows that Port expansion would play a minor role in I-26 needs, but would advance the need to improve some sections of I-526 about three years. In response, the Ports Authority will seek to take a leadership role in securing Federal funding.

The Ports Authority's Board requested the study after concerns over traffic were raised during the permitting process for terminal construction on Daniel Island. "We heard loud and clear the community's concerns about traffic," said Edgar A. Buck, SCSPA Board Chairman. "So we looked closely at long-range traffic projections for both the community and for the port."

The study evaluated 15 sections of the Charleston area's two primary arteries, interstates 26 and 526. First, it presented expectations of the community's long-term traffic growth without port expansion. The local CHATS model provided this view, called "Background Traffic." New port traffic from a terminal on Daniel Island was manually applied on top of these traffic counts.

The study shows that growth in other areas of the community, including residential, recreational and commercial traffic, would drive most of the road requirements over the next two decades. While Port expansion on Daniel Island would advance the need for improvements to a 5-mile segment of I-526, the growth in Port traffic is not out of line with the overall growth expected for other areas of our community.

Virtually all of the port's impact on traffic would be centered on a section of Interstate 526 between the proposed terminal site and I-26. "Because the impact is rather limited, our attention can be focused and targeted on this area," said Bernard S. Groseclose Jr., President & CEO of the SCSPA.

"Although port traffic would only be a small piece of the infrastructure challenges facing our community, it is vital that we address them," said Groseclose. "Congestion is as much of a concern to the Port as it is to the community. It is important that commerce and the motoring public continue to move freely, keeping our economy healthy and our quality of life high."

The SCSPA said Wednesday that it will take a leadership role in an infrastructure planning effort to seek Federal funds.

"Because of the role the Port plays in the state and national economy, we can be very helpful in these efforts," said Groseclose. "In hosting one of the nation's busiest commercial seaports, Charleston certainly deserves, and can win, preferential consideration. The Federal government recognizes a port's role, and therefore affords favorable treatment to intermodal connections in major seaports."

Overview of Traffic Study Related to
Port Expansion on Daniel Island

STUDY OBJECTIVE - To determine how traffic from a new port facility on Daniel Island would impact local roads.

KEY FINDING - As a result of overall growth in the area's population and traffic, Port expansion would play a minor role in I-26 needs over the coming two decades, but would advance improvements to the five-mile section of I-526 between Clements Ferry Road and I-26 about three years.

METHODOLOGY - Evaluated the 15 major sections of I-26 and I-526, and projected two scenarios.
Scenario 1 - No new Port facility is constructed in Charleston.
This local "background" traffic growth, from residential, existing Port and other commercial sources, comes directly from the CHATS (MPO) model.
Scenario 2 - A new Port facility is constructed on Daniel Island in Charleston.
On top of the local "background" traffic, we manually added new Daniel Island port traffic. We assumed new capacity comes on line in 2006. This traffic is driven by expected demand and is not limited by any specific terminal size or proposal.


Non-port traffic will drive a number of road improvements even before port expansion would come on line. Ten of the 15 road segments need improvement in advance of opening a new terminal; one will even require two improvements.

Port expansion on Daniel Island will not create any new road construction needs, but will advance the need for improvements to one segment of I-526. The 5-mile section between Clements Ferry Road and I-26 would have to be improved three years sooner with port expansion than without.