# Aggregated trip rate on a workday in the Helsinki metropolitan area

## Scope

What are the trip rates by different vehicle types if trips are aggregated in an optimal way (limited by the willingness of passengers to use different modes of transport)?

## Definition

### Data

This module calculates the actual trips, modes of transportation, and delays during trips and vehicle transfers. It also calculates the kilometres traveled by each type of vehicle and number of vehicles needed.

The composite traffic trips are allocated into different vehicles. The following hierarchy is used in allocation. If the criterion is fulfilled, that number of passengers is allocated, and the rest will go to the next criterion. The criteria are used for a group of trips that has the same origin, destination, and time. Time resolution is 12 min. Origin and destination are described as '129-areas' used for city authorities in Helsinki metropolitan area. The 129 areas have on average 7300 inhabitants (0, 25%, 50%, 75%, and 100% percentiles are 0, 3400, 6800, 10300, and 28300, respectively). [1]

1. Use an 8-seat vehicle if there are enough passengers to get it full.
2. Use a 4-seat vehicle if there are enough passengers to get it full. Divide the trips into two parts so that the passengers change vehicle in the most busy point along the route. Then,
3. Use an 8-seat vehicle if there are enough passengers to get it full.
4. Use a 4-seat vehicle if there are enough passengers to get it full.
5. Use a 4-seat vehicle for all remaining trips.

The criterion is checked at the actual arrival time at the transfer point, i.e. the model takes into account the different travel times between areas.

The following outputs are calculated:

• Number of passenger trips by mode (car or composite traffic)
• Number of passenger trips by vehicle type. Note that in this output, the trip that includes a transfer is calculated twice.
• Vehicle kilometres driven
• Parking lots needed for the vehicles that are used
• Average vehicle numbers per hour for the 30 most busy links at 8.00-9.00 in the morning
• Number of vehicles needed
• Waiting time due to traffic jams and waiting for composite vehicle to arrive.

The outputs of each scenario are indexed (when relevant) by period (day, evening, night); zone (Helsinki downtown, other centre, suburb), length of trip (less or more than 5 km), and vehicle type (8-seat or 4-seat vehicle with of without transfer, or car).|

# trips