PTV Group - Logistics Forum

Daniele wrote:A customer of us using PTV DEV asked how to retrieve back the emissions for each countries touched by the routing; my suggestion was to activate border events and divide the initial routing into subrouting from start waypoint to first coordinates of border events + first coordinates of first border events to second coordinates of second border events+...+n-1 coordinates of n-1 border events to end waypoint;

In a note an excel in which I did a test of a routing from Perugia (IT) to a location in DE.
You finde the PTV DEV requests and emisions total that is exactly the sum of the partial ones:
I obtained two border events, that contains coordinate of CH border and coordinates of DE Border.

So I created the routing request with same date/hour for start waypoint to first border coordinates event and obtained the
emission in IT (SUBROUTE1)
Then I created another routing from first border coordinates event and coordinates of DE Border events, so I obtained the emission in CH (subroute 2).
Last part is the routing from coordinates of DE Border events to end waypooints, so I obtained DE emission (subroute 3).
This is the values I obtained with a quick test..if you sum the values of subroute 1,2,3 of each value you obtain the correspondant values of the TOT routing:

Scope	fuelConsumption	co2eTankToWheel	co2eWellToWheel	energyUseTankToWheel	energyUseWellToWheel
TOTAL	464.37..	1490.22..	1808.36..	20037.122..	23832.45..
Subroute 1	187.40	601.39	729.77..	8086.135	9617.77
Subroute 2	115.19	369.66	448.58	4970.38	5911.84
Subroute 3	161.78	519.19	630.03	6980.99	8303.29

Is this the way to follow?

• The emission calculation on a "route", a single "leg" or a "segment" may depend on more than just the "relative length": Some emission standards such as HBEFA based ones use more attributes of a segment, e.g. the elevation. That means that two segments with equal length could return different emission values.
• Furthermore the loading status of a vehicle can change from one wayoint to another. If the standard you use uses the total weight ( or load weight) of a transport vehicle the linear approach fails, too.