Forecasting Short-Term Traffic Flow by Fuzzy Wavelet Neural Network with Parameters Optimized by Biogeography-Based Optimization Algorithm

Table 2

Vehicles and their dimensions.

Category	Vehicles included	Projected rectangular on ground (m^2)	Area ratio car (reference vehicle)
Car	Car, jeep	5.39	1.00
Bus	Bus	24.74	0.22
Truck	Truck	17.62	0.31
Light commercial vehicle	Mini bus, van	12.81	0.42
Tractor	Tractor trailer	16.28	0.33
Two-wheeler	Scooter, motorbike	1.2	4.49