These counts were used to establish the Peak Period Factors as In order to calibrate the new auto assignment with freight, input data was collected for auto vehicles and freight vehicles from transit counts. Seemed to have a preference for a significant increase in the VOT while the other classes showed smaller increases. In this model however, light commercial vehicles The lowest fitness result was 1188, which is slightly lower than the first model, but the difference in value is very minor. The distribution pattern of Auto, Medium and Heavy vehicles being in a similar range with only light commercial vehicles being higherĪlso held in this estimation. The results for this show similar results as compared to the first model. Peak Period Factors being used instead of the ones calculated in the method above for Auto vehicles only. This led to a new estimation run with the TTS This would lead to the Peak Period Factors as currentlyĬalculated to be too peaky for the PM since new demand would be added and therefore the model would be able to hit counts without bumping up the Peak Hour Factors. TTS Peak Hour Factorsĭuring this process, there was discussions regarding a new PM model for GTAModelV4.1 which would help to fill in the missing TTS trips during that time period. Medium and Heavy vehicles show values that are a little higher than auto.
#Single class traffic assignment transcad professional#
Sense as they carry professional workers. Light trucks showed the highest Value of Time which would make There were some trends though, Auto perception generally found that being in the mid $30/hour range to minimize the error. There was not too much variation between even the lowest perceptions and the highest perception. The results from the run showed that the lowest fitness for this was found to be 1193. The same method was done for the PM time period. A lower fitness value implies a better model,
The error was calculated for each station, summed up for each time period, and divided by the number of stations in that time period to obtain the fitness. Various different Peak Period Factors were then tested out. When finding the Peak Hour Factors for the AM and PM time periods for auto a $0.067603/km charge with a $50/hour value of time were used. The capacity on the highways and ramps were also bumped up by 10% in order to remove the restriction that was in place as a zero order approximation. The network still resulted in connectivity issues for heavy vehicles, so certain centroids had to have special connectors that contained only the heavy truck mode and connected to the nearest road that allowed heavy trucks. The 407 Tolls were also updated with the 2016 values.įor heavy truck restrictions, new restrictions were updated where possible, but improvements focused mainly on Toronto, Peel Region, and Hamilton. The Emme Network was updated to 2016 and the collector and express were split on the highways that used a core collector system (401, 403, 404).
The stations were also mapped to stations in the Emme Network. Stations were mapped to screenlines based on data obtained from DMG. This was done for both screenlines and stations.
A python script was then run in order to determine the peak hour using a rolling hour window for each time period. GTAModel V4.1 Preparation of Input DataĪll counts for all stations and screenlines for auto vehicles, light trucks, medium trucks, and heavy trucks were obtained from CCDRS in 15 minute windows. This model is nearly identical to other traffic assignment models commonly in-use around the region, save for minor implementation details. Road tolls (e.g., the 407 ETR) are included as a generalized cost, and converted to perceived minutes using a Time Value of Money (TVALM) parameter. with the Map Librarian 20 Creating a Map by.GTAModel V4.0 uses a Static User Equilibrium (SUE), single-class traffic assignment procedure implemented in Emme 4.1/4.2. Map When Files are Missing 19 To Stop a Map. © 2002 Caliper Corporation, All Rights Reserved. Matrices, Figures, and Layouts 13 Workspaces. This is the reason why the previous page was blank (the previous page is the back side of the cover) This page intentionally starts on an odd page, so that it is on the right half of an open book from the readers point of view. This is "Title " - you may use this page to introduce your product, show title, author, copyright, company logos, etc. Title page 1 Use this page to introduce the product by Alireza Giahi
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