|
| Parameter | Definition | Value |
|
| R | List of recorded (observed) door-to-door trips | |
| r | Each recorded (observed) door-to-door trip | r = {Or, Dr, ts, dtr, mr} |
| Or | Coordinates (latitude, longitude) of the origin of a recorded trip (r) | |
| Dr | Coordinates (latitude, longitude) of the destination of a recorded trip (r) | |
| ts | Start time (i.e., departure time) of the recorded trip (r) | |
| dtr | Date of the recorded trip | |
| mr | Main transportation mode (m ∈ M) in each multimodal trip so that the longest distance of the trip is traveled by mode m. | |
| M | Modes of transportation | {Car, bus, train, metro, tram, ferry, bike, E-bike, walk} |
| Ar | List of computed alternative trips for each r ∈ R | |
| a | An alternative multimodal route for a trip | a = {O, D, ts, d, m, T, e} |
| T | Door-to-door travel-time of each trip | |
| d | Door-to-door distance traveled along the trip route | |
| e | Emission per traveler of the whole multimodal door-to-door trip a | Calculated based on equation (1) |
| Tmin | Travel time with the fastest choice of computed alternatives (A) | |
| C | Maximum travel time increase from Tmin tolerated by traveler | Assumed 3 minutes |
| ∆T | Increased travel time with an alternative compared to fastest choice | |
| trar | Chosen low-carbon time-relevant alternative for a recorded trip r | |
| TRA | List of low-carbon time-relevant alternatives (TRAs) for all recorded trips regardless of the original mode choice mr. | Each list element is {r, trar} ∈ TRA, and |TRA| = |
| TRS | Potential time-relevant modal shifts (TRS): list of car trips (mr = “car”) where a potential time-relevant low-carbon alternative is available | Each list element is {r, trar} ∈ TRS, and |TRS| ≤ |
| PTS | Public transportation schedule for the city | Usually available in general transit feed specification (GTFS) files created and updated by cities or transportation agencies |
| PTR | Public transportation route and line data for the city | In GTFS files as explained above |
| NET | Road network comprising digitalized street network data of the city that may also include biking paths | Provided by OpenStreetMap (OSM) |
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