However, obstacles to a daily "Cardinal" persist. Track capacity is limited on the Buckingham Branch Railroad, a short line railroad between Orange and Clifton Forge, Virginia where the "Cardinal" operates along former C&O/CSX trackage, preventing frequent freight trains from passing a daily "Cardinal". This problem also applied to the planned-but-failed "Greenbrier Presidential Express" train, which would also have traversed the Buckingham Branch on a weekly basis. The Buckingham Branch requires additional funding to expand several sidings before allowing additional service. Another obstacle is freight congestion in Chicago particularly at the 75th Street Corridor on Chicago's South Side. Infrastructure improvements are being made at both obstacles. The Orange Branch between Orange and Gordonsville raised train speed after the completion of a track and signal project in 2017. The Chicago Region Environmental and Transportation Efficiency Program (CREATE) has received funding under a public–private partnership (P3) for the 75th Street Corridor with construction beginning in October 2018 and is scheduled to be finished by 2025.