I've said this before, but the construction of taxiway foxtrot provides a unique opportunity to allow access to the part of the field to the east of where foxtrot will be. When they construct foxtrot they should do it with a cut and cover tunnel. Once foxtrot is complete, they can then build a joining cut and cover tunnel under taxiway delta without major disruption to aircraft movements. This would create underpass access from the CTA to the eastern part of the field. This access could be used for airside passengers, an extension of the DART, airside road or landside road or combination of the above.