In: Economics
| 
 All costs in $M  | 
 Bridge M  | 
 Bridge L  | 
| 
 Land acquisition  | 
 $220  | 
 $195  | 
| 
 Annual O & M  | 
 2  | 
 3  | 
| 
 Annual increase  | 
 0.04  | 
 0.03  | 
| 
 Major Maintenance (Year 25)  | 
 185  | 
 210  | 
| 
 Salvage Cost  | 
 30  | 
 27  | 
| 
 Initial Construction  | 
 $585  | 
 $470  | 


Therefore, the Bridge L is better. Because the NPV is less negative than the Bridge M.

Please don't forget to rate the answer if its helpful, thank you.