Monday, May 1, 2017

Bridge vs Tunnel

Just a thought. What is they built a bridge to Penn Station in New York rather than a tunnel. Here is the result. First for a tunnel, I have used the average estimates from various sources:


Tunnel
Amount $20,000,000,000 
Duration  40 
Interest 4.00%
Passengers per day  600,000 
Passenger days  156,000,000 
Fee per Trip $6.48


Annual Bond Payment $1,010,469,786 


Then for a bridge. I assume that one just duplicates the Tappan Zee Bridge.


Bridge
Amount $4,000,000,000 
Duration  40 
Interest 4.00%
Passengers per day  600,000 
Passenger days  156,000,000 
Fee per Trip $1.30


Annual Bond Payment $202,093,957 



Thus for a $1.30 a trip we can get a bridge in about 3 years! So what is the problem?