I'm wondering if the stock turnover method can be used with the activity analysis method for the transport sector? I'd like to calculate passenger-km by public transit (buses) as a function of private vehicle stock and total transport demand (passenger-km as a function of income and population) in a given year. Currently, when I start with the activity analysis, specifying transport demand as passenger-kms, and try adding stock turnover branches under 'private vehicles', I can't really find a place to insert total number of vehicles in the base year.

Thanks in advance,

Poushali

Stock-turnover and activity analysis are two separate demand calculation methods in LEAP, so they cannot be blended. In other words, there is no Activity Level variable in the stock-turnover calculations (and the activity levels of a stock-turnover branch's parent branches are ignored in the calculation of final energy demand). Have a quick read here to see how energy demands are calculated in this case. Remember that the total number of vehicles can only be entered for the model's historical period - after this, the stock depends on the number of vehicles which survive from prior years, as well as any newly sold vehicles.

When using the stock-turnover methodology, the variables which would be most analogous to the Activity Level variable would be the Sales and Mileage variables. But there is no direct, simple way to control the total number of passenger-km which are demanded, since the number of vehicle-km in each year depends on both the number of vehicles and the distance that each vehicle travels (together with any annual mileage decay lifecycle profile, if you have included one).

Hope this helps,

Taylor

Can the output of a stock turnover branch be used in other branches (not a parent branch but a 'sibling' one) ? I understand I can't control the passenger-kms within a stock turnover analysis, but could I control the public transit (passenger km) demand using an activity analysis which takes in inputs from a stock turnover analysis branch?

Note that LEAP does not allow references to result variables calculated in the same year - for this you'll likely need to use the PrevYearValue() function, or similar.

Hope this helps,

Taylor

Poushali