TRAMWAY REPLACEMENT PRELIMINARY ENGINEERING

1
Tramway Modernization Cost Benefit Analysis
Roosevelt Island Tramway October 4, 2007
2
Alternatives

• Replace Critical Subsystems
• New Similar Tramway
• New Similar Tramway with Added Redundancy
• New Dual Shuttle

3
Alternative 1Replace Critical Subsystems

• New track ropes, roller chains, hangers, and
  cabins
• 7 year life expectancy
• Capital cost 5.6 million (2007 )
• 8 weeks downtime for subsystem replacement

4
Alternative 2New Similar Tramway

• Fundamentally new system
• Existing functionality and performance
• 30 year life expectancy
• Capital cost 14.25 million (2007 )
• 6 months downtime for replacement

5
Alternative 3New Similar Tramway with Added
Redundancy

• Fundamentally new system
• Improved service and availability
• 30 year life expectancy
• Capital cost 17.25 million (2007 )
• 7 months downtime for replacement

6
Alternative 4New Dual Shuttle

• Replace with two systems
• Improved service, reliability, and flexibility
• 30 year life expectancy
• Capital cost 20.4 million (2007 )
• 7 months downtime for replacement

7
Life Cycle Costs

• Capital costs
• Operating and maintenance costs
• Power costs
• Parts and supplies costs

8
Life Cycle Costs Key Assumptions

• All Costs in 2007
• Inflation impacts future costs and revenues
  equally
• Time value of money is 5 annually
• Ridership and revenue grow by 20
• Base ridership and revenue same for all
  alternatives

9
Annualized Life Cycle Costs
Alt 4 New Dual Shuttle
Alt 3 New Similar Tram Redundancy
Alt 2 New Similar Tram
Alt 1 Replace Critical Subsystems
10
Historical System Ridership
11
Historical System Revenue
12
System Ridership and Revenue
13
System Down Time
Alt 4 New Dual Shuttle
Alt 3 New Similar Tram Redundancy
Alt 2 New Similar Tram
Alt 1 Replace Critical Subsystems
14
Net Annual Revenue / Rider

• Revenue per rider
• Annual Revenue Annual Costs
• Annual Ridership

15
Net Annual Revenue / Rider
Alt 4 New Dual Shuttle
Alt 3 New Similar Tram Redundancy
Alt 2 New Similar Tram
Alt 1 Replace Critical Subsystems
16
Summary of Cost-Benefit
17
Non Quantifiable Benefits

• Safety/rescue
• Reliability/dependability
• Flexibility
• ADA Access

18
Alternative 2New Similar Tramway

• Increases Revenue Per Rider by 11 Cents
• Compared to Alternative 1
• Reduces likelihood of a system failure
• Improves reliability and dependability by
  reducing unscheduled down time
• Flexibility of service similar to Alternative 1
• Improved reliability enhances ADA Access

19
Alternative 3Added Redundancy

• 6 Cents Per Rider Compared to Alternative 2
• Adds
• Redundancy reducing likelihood of need for rescue
  operation should system fail
• Further improves reliability and dependability
  by reducing unscheduled down time
• Flexibility of service similar to Alternatives 1
  and 2
• Improved reliability enhances ADA Access

20
Alternative 4Dual Shuttle

• 11 Cents Per Rider Compared to Alternative 2
• Adds
• Virtually eliminates need for rescue operation
  should system fail
• Improves reliability and dependability by nearly
  eliminating unscheduled down time
• Dual/independent system adds service flexibility
  not provided by other alternatives
• Provides most reliable/dependable ADA Access1

21
What A Dual Shuttle Might Look Like
22
or