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U.S. Department of Transportation
Limitations of Current Systems
1.Limited geographically
by tolling and other roadside infrastructure
2.Not flexible
in size, location, nor the time they are operational
3.Do not
consider real-time traffic and environment data when establishing
parameters for the Low Emissions Zone
4.Emissions
data are not collected from vehicles
5.Do not
determine fees for entering the Low Emissions Zone based on vehicle
specific data
6.Do not
consider incentives to drivers practicing eco-driving strategies
7.Limited
in the data they provide travelers with parameters about the Low
Emissions Zone or alternative travel choices for entering the Low Emissions
Zone
8.Do not
consider restrictions for passenger vehicles or encourage “green” transportation
choices like carpooling, vanpooling, and transit.