2.1 The BCC model of DEA evaluation 
There are many methods of DEA model, and there 
are two main types: fixed returns to scale DEA 
model -- CCR model and variable returns to scale 
DEA model -- BCC model. The CCR model is the 
basic DEA model, which assumes that the input of 
decision unit (DMU) can increase the output. That's 
an ideal assumption. In reality, changes in scale lead 
to different outputs. Therefore, a variable scale 
compensation DEA model, namely the BCC model, 
is produced. It measures the pure technical 
efficiency, comprehensive efficiency and scale 
efficiency of the decision unit. In this paper, the 
BCC model is used to evaluate the transportation 
efficiency of Guangdong province. 
2.2 Input and output index selection 
For transportation, the input indicators can include 
the number of employees, the length of the line, the 
number of stations, and the number of vehicles. The 
output indicator can include passenger and freight 
volume, and turnover, etc. Taking into account data 
availability, the following index is used as input X 
and output Y index (input indicator: railway line 
mileage
; Highway mileage ; Mileage of 
highway lines
; Water route mileage ; Air 
miles
; Turnover of goods ; Turnover of 
passenger
. The original data were obtained by 
referring to the statistical yearbook of Guangdong 
province from 2005 to 2015, as shown in table 1. 
Table 1 The data of the input and output index of transportation in Guangdong province from 2005 to 2015. 
 
Year 
Mileage of the line Turnover of 
goods 
Turnover of 
passenge 
 
Railway 
 
Highway 
 
Expressway 
 
Inland 
waterway
 
Civil air route 
2005 
2006 
2007 
2008 
2009 
2010 
2011 
2012 
2013 
2014 
2015 
1924 
1862 
1871 
1859 
2176 
2297 
2555 
2577 
3203 
3818 
5141 
115337 
178387 
182005 
183155 
184960 
190144 
190724 
194943 
202915 
212094 
216023 
3140 
3340 
3518 
3823 
4035 
4839 
5049 
5524 
5703 
6266 
7021 
13596 
13596 
13596 
13596 
13596 
13596 
13596 
13780 
12096 
12150 
12150 
1080706 
1113479 
1413918 
1365418 
1699629 
1807385 
1671100 
1851000 
2140600 
2285800 
2372900 
3917.43 
4162.77 
4489.69 
4591.22 
4942.83 
5933.88 
7113.29 
9780.56 
12212.56 
15020.92 
15130.59 
2043.23 
2245.37 
2626.71 
2551.92 
2853.30 
3342.23 
3851.84 
4372.06 
3538.10 
3967.28 
4335.79 
Note: the mileage unit is km, and the freight 
units are 100 million tons of kilometers, and the 
passenger turnover units are 100 million people of 
kilometers 
In this case, because the civil aviation routes in 
the statistical yearbook of 2011-2015 are 
10,000kilometers, this article can only be converted 
directly to kilometers. 
According to the 11 decision units in table 1, 
BCC model and DEAP2.1 analysis software were 
applied to analyze the traffic efficiency of 
Guangdong province. The evaluation results are 
shown in table 2 and table 3 respectively. 
As we can see from table 2, the transportation 
system of Guangdong province from 2005 to 2015 
has three years (2012, 2014, 2015) comprehensive   
efficiency, technical efficiency and scale efficiency 
are all effective in DEA. In the year when the DEA 
was invalid, overall efficiency kept rising, and the 
comprehensive efficiency reached the effective state 
after 2012. In addition to 2009 and 2012, the 
technical efficiency of transportation in Guangdong 
province is 1, indicating that the optimization of 
input and output has been achieved. At the same 
time, the five years when DEA is invalid (2005, 
2006, 2007, 2008, 2013), increasing return to scale 
is increasing that is to say increase inputs can drive 
the comprehensive efficiency of transportation. 
Therefore, Guangdong province should increase the 
transportation scale input, strengthen the 
management of all links, and improve the 
transportation efficiency.