🧹 Chore: Confirm that Link21 Improvements are Representing Prices in Dollars rather than Cents

[DavidOry]

In #127 we are bringing in transit improvements made to tm2py as part of the Link21 study. Because Link21 assumes prices are in cents (which is the assumption in TM1.5) and tm2py assumes prices are in dollars, we need to confirm that the changes are treating prices accurately.

Checks:

• Input toll prices are expressed in dollars (bridge tolls) or dollars per mile (value tolls)
• Roadway prices are being converted to minutes in the generalized cost expressions in the roadway assignment procedures
• Roadway prices are being converted to minutes in the generalized cost expressions in the transit assignment procedures
• Prices are being recorded as dollars in the highway skims
• Prices are being recorded as dollars in the transit skims
• Costs are assumed to be in dollars in the mode choice UECs