I did the half and half for 5 months last year. Bike leg was 11.5 mi. which is a very nice distance, happened to be all MUP which was fantastic. Total commute time was 1:00 to 1:10. Would have been nice to be able to bike door to door, but I was grateful for the 50% I was able to pull off. Distance was not the killer so much as lack of bikeable roadways past the half way point.