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====== Wool Crossing Traffic Simulation With WoolRATH Traffic Data ======

This page details the analysis of the Traffic travelling through Wool using the data provided by WoolRATH.

The Traffic survey Data was collected by volunteers on two separate dates (6th September 2016, 9th September 2016).

The following table shows the results from the traffic survey. 

Thank you to all the volunteers who capturing the numbers.

^ Date	^ Location	^ Time	^ Direction	^ Cars	^ HGV ^
| 06/09/16	| Winfrith Roundabout	| 08:00:00	| W	| 439	| 17 |
| 06/09/16	| Winfrith Roundabout	| 08:00:00	| E	| 639	| 30 | 
| 06/09/16	| Winfrith Roundabout	| 16:00:00	| W	| 568	| 14 |
| 06/09/16	| Winfrith Roundabout	| 16:00:00	| E	| 555	| 53 |
| 06/09/16	| Station Garage	| 08:00:00	| W	| 500	| 17 |
| 06/09/16	| Station Garage	| 08:00:00	| E	| 518	| 25 |
| 06/09/16	| Station Garage	| 16:00:00	| W	| 603	| 9 |
| 06/09/16	| Station Garage	| 16:00:00	| E	| 532	| 12 |
| 09/09/16	| Winfrith Roundabout	| 08:00:00	| W	| 362	| 16 |
| 09/09/16	| Winfrith Roundabout	| 08:00:00	| E	| 306	| 26 |
| 09/09/16	| Winfrith Roundabout	| 16:00:00	| W	| 651	| 18 |
| 09/09/16	| Winfrith Roundabout	| 16:00:00	| E	| 547	| 14 |
| 09/09/16	| Station Garage	| 08:00:00	| W	| 409	| 15 |
| 09/09/16	| Station Garage	| 08:00:00	| E	| 454	| 23 |
| 09/09/16	| Station Garage	| 16:00:00	| W	| 679	| 17 |
| 09/09/16	| Station Garage	| 16:00:00	| E	| 551	| 16 |


To generate this model, the Counts taken at Station Garage at 8am have been used.

The following table shows the results that will be used to create the model:

 
^ Direction ^ Cars ^ HGV ^
| W | 500 | 17 |
| E | 518 | 25 |


To generate the model, we also need the level crossing down times. This data is available from the Open Rail Data (Note1). 


<code>
Tue Sep  6 08:14:58: Train 1W96, From DR62, To 5268 - Closing
Tue Sep  6 08:19:40: Train 1W51, From 5261, To 5267 - Opening

Tue Sep  6 08:39:53: Train 1W52, From DR62, To 5268 - Closing
Tue Sep  6 08:45:04: Train 2W09, From 5261, To 5267 - Opening
</code>


====== Initial Simulation ======


The following video shows the initial simulation using the data from above (the Crossing down times and WoolRATH data).

NOTE: The Video of the simulation has been started at ~ 8:15 to see the first crossing down. The Simulation is also running faster than real time (benny hill mode).


{{youtube>3UmQwQO9plw|Initial Simulation}}


This simulation is based on current counts taken by people. No additional information has been used to create the simulation other than the crossing down times. 

====== Simulation With extra 1000 Homes ======

The previous simulation shows the current situation in Wool. The next stage is to show how the extra 1000 homes will affect the traffic flows. 

The “Potential Traffic Impacts of Development in the Wool Area” (Referred to as PTI see Note2) provides the TRICS (Trip Rate Information Computer System) estimated trip rate for the extra 1000 homes where the Vehicles are leaving at 8am. This is given as 346 over the hour.  

The PTI uses a split of 55:45 split for West and East bound traffic. For this simulation the East/West split measured at Station Garage at 8am was used. It has also been assumed that the 1000 homes will not generate any extra HGV traffic.


^ Direction ^ Cars ^ % Total Cars ^ Est Cars Leaving new development ^
|W	|500	|49.12%| 170 |
|E	|518	|50.88%| 176 |


From the data above, the extra 1000 homes will generate 176 cars between 8am and 9am heading east (towards Wareham). The other 170 vehicles have been ignored because they are heading away from the crossing.

This following video shows the simulation output.


{{youtube>WQUev9N0Wnw|Simulation With Extra 1000 Houses}}


The Video shows the Queue forming on the first crossing down (about 8:15am). 





====== Conclusion ======

The Videos show that without the extra homes, the queue goes back as far as Linclieth Road. Adding the vehicles generated by the extra 1000 homes makes the queue go past Bailey's Drove. 

{{:screenshot_2016-11-29_20-09-07.png?500|}}

This distance is about 300m.

The original "Potential Traffic Impacts of Development in the Wool Area” (Note2) assessment predicted a maximum queue length of 82m (514m-432m, page 17, table 8.1). The simulations above show that the queue length from the extra 1000 homes is closer to 300m.

The simulation does not take into account traffic coming from Lulworth into Wool past the Spar Shop. In previous [[woolcrossingtrafficsimulation|simulations]] adding this data shows that the traffic junction by the Station will become congested and a major traffic bottleneck. 


===== Notes =====

//Note1//: Open Rail Data http://nrodwiki.rockshore.net/index.php/Main_Page

//Note2//: {{:trafficimpactwoolareatm9999_j032_rev4._final_pdf.pdf|Potential Traffic Impacts of Development in the Wool Area(PTI)}}