Our big and coarse model is know as BSTM...stands for Brisbane Strategic Transportation Model. Its for the BSD...which the city and some full and part councils around it.
This ‘study area’ is divided into 1500 internal zones. In addition to that it has 15 ‘gateway’ zones and about 170 special purpose zones (mostly rail and bus terminals).Network is made up of about 10,000 nodes and 25,000 links. It also has about 800 pt routes.
Travel is described in terms of eight modes. Notice that Car appears twice and PT thrice. Also notice that PT is made up component systems (rail, bus, ferry etc).
Also, and independently, travel is described in terms of its intent (or purpose). Notice how frequently the word ‘Home’ appears. Also notice that workers are divided by the colour of their collar....and student are divided between school and uni.
Roads are grouped according some obvious attributes such as lanes and central divisionAnd some not so obvious ones such as .....how many cars can flow on each of its lane.....and how fast they will go unhindered....and how quickly this speed will fall with increasing volume.The complicated looking function ensures that time taken by a vehicle on a link increases with increasing volume (notice that every symbol except v is a constant). The complications of iterative procedures are taken care by modern day tools.
Remember that PT is a single mode (Rail or Bus or Ferry is not an independent mode). A journey is made up of walk, in-vehicle travel and wait. Complications are taken care by modern day tools.Lot of these assumptions might sound very coarse but they are better than not having them at all.
Basic structure is traditional and simple but many of the constituent sub-models are very modern.
Has its own toolbar
Demonstrate VISSIM Preview and ICA LOS analysis
Line transfers for feeder services/ coordinated services