BTS | Table B1 - Estimated General Model

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BTS Home > Publications > Journal of Transportation and Statistics > Volume 6 Number 2/3 > Paper 6

Table B1
Estimated General Model

Dependent variable: D(LTRAFFIC)
Estimation method: weighted least squares
Total system (unbalanced) observations: 990

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	Coefficient	Std. error	t-statistic	P-value
D(LGDP)	0.8942	0.0410	21.8117	0.0000
D(LPGAS)	–0.3369	0.0157	–21.4261	0.0000
D(LTRAFFIC(-1))	0.3642	0.0160	22.6942	0.0000
D(LTOLL1)	–0.0371	0.2279	–0.1626	0.8709
D(LTOLL2)	–0.2754	0.2630	–1.0471	0.2954
D(LTOLL3)	–0.2338	0.2631	–0.8886	0.3745
D(LTOLL4)	–0.3237	0.2548	–1.2704	0.2043
D(LTOLL5)	–0.1799	0.2101	–0.8565	0.3920
D(LTOLL6)	–0.4766	0.1451	–3.2853	0.0011
D(LTOLL7)	–0.4758	0.1274	–3.7354	0.0002
D(LTOLL8)	–0.4630	0.1362	–3.3982	0.0007
D(LTOLL9)	–0.2811	0.1296	–2.1689	0.0304
D(LTOLL10)	–0.4903	0.1258	–3.8977	0.0001
D(LTOLL11)	–0.4512	0.1157	–3.9003	0.0001
D(LTOLL12)	–0.5876	0.1893	–3.1042	0.0020
D(LTOLL13)	–0.3588	0.1705	–2.1048	0.0356
D(LTOLL14)	–0.3555	0.2371	–1.4994	0.1341
D(LTOLL15)	–0.1118	0.1281	–0.8725	0.3832
D(LTOLL16)	–0.3144	0.1504	–2.0901	0.0369
D(LTOLL17)	–0.0580	0.1998	–0.2902	0.7717
D(LTOLL18)	–0.1894	0.1477	–1.2828	0.1999
D(LTOLL19)	–0.3475	0.2299	–1.5118	0.1309
D(LTOLL20)	–0.3417	0.1964	–1.7398	0.0822
D(LTOLL21)	–0.4309	0.2585	–1.6672	0.0958
D(LTOLL22)	–0.3609	0.4125	–0.8748	0.3819
D(LTOLL23)	–0.1517	0.0422	–3.5972	0.0003
D(LTOLL24)	–0.1716	0.0390	–4.4061	0.0000
D(LTOLL25)	–0.1815	0.0456	–3.9764	0.0001
D(LTOLL26)	–0.2204	0.0629	–3.5052	0.0005
D(LTOLL27)	–0.2831	0.0827	–3.4209	0.0007
D(LTOLL28)	–0.2653	0.0608	–4.3657	0.0000
D(LTOLL29)	–0.3136	0.0413	–7.5963	0.0000
D(LTOLL30)	–0.4182	0.0646	–6.4717	0.0000
D(LTOLL31)	–0.4387	0.0534	–8.2101	0.0000
D(LTOLL32)	–0.4062	0.0465	–8.7398	0.0000
D(LTOLL33)	–0.3620	0.0537	–6.7361	0.0000
D(LTOLL34)	–0.3915	0.0414	–9.4648	0.0000
D(LTOLL35)	–0.3447	0.0342	–10.0812	0.0000
D(LTOLL36)	–0.3582	0.1184	–3.0254	0.0026
D(LTOLL37)	–0.3701	0.0445	–8.3134	0.0000
D(LTOLL38)	–0.3904	0.0512	–7.6203	0.0000
D(LTOLL39)	–0.3992	0.0489	–8.1651	0.0000
D(LTOLL40)	–0.5231	0.2504	–2.0892	0.0370
D(LTOLL41)	–0.4556	0.2466	–1.8476	0.0650
D(LTOLL42)	–0.4489	0.1657	–2.7082	0.0069
D(LTOLL43)	–0.4662	0.2451	–1.9018	0.0575
D(LTOLL44)	–0.3729	0.1515	–2.4614	0.0140
D(LTOLL45)	–0.4115	0.1619	–2.5420	0.0112
D(LTOLL46)	–0.4045	0.2312	–1.7495	0.0806
D(LTOLL47)	–0.5029	0.1554	–3.2366	0.0013
D(LTOLL48)	–0.0931	0.2265	–0.4108	0.6813
D(LTOLL49)	–0.2227	0.1657	–1.3439	0.1793
D(LTOLL50)	–0.1935	0.0913	–2.1199	0.0343
D(LTOLL51)	–0.3617	0.0650	–5.5628	0.0000
D(LTOLL52)	–0.4411	0.0647	–6.8186	0.0000
D(LTOLL53)	–0.8415	0.1494	–5.6340	0.0000
D(LTOLL54)	–0.8140	0.1435	–5.6730	0.0000
D(LTOLL55)	–0.8301	0.1714	–4.8438	0.0000
D(LTOLL56)	–0.3729	0.1065	–3.5004	0.0005
D(LTOLL57)	–0.3294	0.0839	–3.9255	0.0001
D(LTOLL58)	–0.3569	0.1728	–2.0648	0.0392
D(LTOLL59)	–0.3863	0.0936	–4.1281	0.0000
D(LTOLL60)	–0.5015	0.0830	–6.0381	0.0000
D(LTOLL61)	–0.5248	0.1946	–2.6970	0.0071
D(LTOLL62)	–0.4816	0.1138	–4.2314	0.0000
D(LTOLL63)	–0.3233	0.1335	–2.4213	0.0157
D(LTOLL64)	–0.3922	0.0990	–3.9625	0.0001
D(LTOLL65)	–0.4431	0.1168	–3.7933	0.0002
D(LTOLL66)	–0.3706	0.1427	–2.5963	0.0096
D(LTOLL67)	–0.3451	0.0534	–6.4635	0.0000
D(LTOLL68)	–0.3692	0.0562	–6.5701	0.0000
D(LTOLL69)	–0.4417	0.1117	–3.9532	0.0001
D(LTOLL70)	–0.8108	0.2983	–2.7182	0.0067
D(LTOLL71)	–0.8798	0.3854	–2.2825	0.0227
D(LTOLL72)	–0.2516	0.3066	–0.8208	0.4120
D(Z1)	–0.0517	0.0259	–1.9918	0.0467
D(Z2)	–0.0688	0.0240	–2.8680	0.0042
D(Z3)	–0.0720	0.0246	–2.9222	0.0036
D(Z4)	–0.0518	0.0259	–1.9971	0.0461
D(Z5)	0.1548	0.0395	3.9192	0.0001
D(Z6)	0.1689	0.0363	4.6490	0.0000
D(Z7)	0.1197	0.0577	2.0755	0.0382
D(Z8)	–0.0687	0.0214	–3.2092	0.0014
D(Z9)	–0.0621	0.0198	–3.1309	0.0018
D(Z10)	–0.0689	0.0283	–2.4343	0.0151
D(Z11)	–0.0428	0.0228	–1.8769	0.0609
D(Z12)	–0.0554	0.0242	–2.2876	0.0224
D(Z13)	0.0726	0.0248	2.9326	0.0034
D(Z14)	–0.0337	0.0198	–1.7058	0.0884
D(Z15)	0.0622	0.0202	3.0823	0.0021
D(Z16)	–0.0365	0.0172	–2.1197	0.0343
D(Z17)	0.0474	0.0175	2.7040	0.0070
D(Z18)	0.0439	0.0194	2.2611	0.0240
D(Z19)	0.0419	0.0155	2.7086	0.0069
D(Z20)	0.0515	0.0130	3.9495	0.0001
D(Z21)	0.1690	0.0440	3.8452	0.0001
D(Z22)	0.0812	0.0168	4.8386	0.0000
D(Z23)	0.0836	0.0209	4.0077	0.0001
D(Z24)	0.1399	0.0187	7.4758	0.0000
D(Z25)	–0.1377	0.0492	–2.7967	0.0053
D(Z26)	0.0863	0.0178	4.8569	0.0000
D(Z27)	0.0749	0.0175	4.2714	0.0000
D(Z28)	0.0449	0.0206	2.1811	0.0294

Notes: All the variables are defined in first differences (D) of the logarithm (L). GDP = gross domestic product; PGAS = gasoline price; TRAFFIC = average daily traffic volume; TOLL = toll paid per km for the 72 motorway sections; D(Z1)-D(Z28) = the first differences of dummy variables to account for changes in the road network.

Table B1 Estimated General Model

Table B1
Estimated General Model