Time of Day Modeling Restructuring

[joecastiglione]

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• Implement the DaySim method of first modeling arrival and departure time at primary activity, then work outwards for intermediate stops, rather than the CT-RAMP method of departure time from home and arrival time back at home, then filling in details. Make more sense and makes handling of time easier.
• Intermediate stop enhancements. CT-RAMP (and therefore ActivitySim to-date) uses simple probability lookups for intermediate stop purpose and duration. The former can lead to simulation errors when certain activities aren’t available on non-motorized and/or transit tours. The latter makes stop departure time less sensitive to congestion and very challenging to calibrate. Suggest implementing a smarter model-based representation of stop frequency and purpose and replacing the stop departure time lookup table with a probabilistic model. Similarily, possibly implement the ARC CT-RAMP stop departure time choice model instead of simple lookup table.