Calculating the Contribution Rate of Intelligent Transportation System in Improving Urban Traffic Smooth Based on Advanced DID Model

Table 3

Related data of traffic smooth in Beijing.

Year	ASPD	GDP	POP	CVECH	RODM	RODA	PVECH	PPER
2000	18.9	3161	1357	104.1	2471	3502	10353	34.8
2001	19.0	3711	1383	114.5	2493	3701	12945	39.2
2002	19.8	4330	1423	133.9	2504	3857	15046	43.5
2003	20.1	5024	1456	163.1	3347	4315	16753	37.1
2004	20.0	6033	1493	182.4	4064	7287	18451	43.9
2005	23.4	6970	1538	209.7	4073	7437	18503	45.0
2006	22.5	8118	1581	239.1	4419	7286	19522	39.8
2007	20.5	9847	1633	273.4	4460	7632	19395	42.3
2008	23.1	11115	1695	313.7	6186	8940	21507	47.1
2009	23.1	12153	1755	368.1	6247	9179	21716	51.7
2010	22.2	14114	1961	449.7	6355	9395	21548	50.5

Data sources: Beijing Transportation Development Annual Report.