29 8 2012 8 Journal of Highway and Transportation Research and Development Vol. 29 No. 8 Aug. 2012 doi 10. 3969 /j. issn. 1002-0268. 2012. 08. 019 100029 3 2 2 4 U491. 1 + 3 A 1002-0268 2012 08-0112 - 06 Theory and Method of Mid-term Evaluation of Freeway Network Planning WANG Haixia LU Wei LIU Yang PANG Qingge ZHAO Kun China Academy of Transportation Sciences Beijing 100029 China Abstract The theory and method of mid-term evaluation of freeway network planning was investigated from the aspects of level of technical services economic and social situation and environmental impact. The technical evaluation was conducted from the aspects of network performance and traffic quality. The evaluation indexes for network performance were freeway network density and connectivity. The evaluation indexes for traffic quality were load degree and mileage congestion rate. The benefit was evaluated from the aspects of financial benefit and social and economic benefits. The evaluation methods include input-output method system dynamics model investment multiplier method and production function method. The environmental assessment of freeway network was conducted from the aspects of resource consumption cost environmental governance cost environmental management cost and energy saving benefit. This paper both filled the research gap in related fields and laid a solid foundation for adjustment of freeway network planning which has important theoretical and practical significance. Key words traffic engineering freeway network planning mid-term evaluation technical evaluation benefit evaluation environmental assessment 0 4 000 km 2010 20 80 7. 41 10 4 km 2 80 1997 1998 1998 2011-12 - 27 1982 -. 05121184@ bjtu. edu. cn
8 113 2004 3 1 2 3-4 1 1988 6 1 2 5 20 a 1. 1 1. 1. 1 2 γ A km /10 2 km 2 L γ A = L /A 1 γ P km / 10 4 L 3 γ P = L /P 2 γ G km / 10 8 CNY γ G = L /GNP 3 γ T km / 10 4 t km 4 γ T = L /T 4 γ N km / 10 2 veh 1-2 γ N = L /N 5 A P GNP T N L 1. 1. 2
114 29 L /ξ c = 槡 A n 6 2 c L A n 2 ξ 2. 1 c 1. 00 2 c 2. 00 4 c 2. 1. 1 3. 00 6 9 1. 2 60% 1. 2. 1 q i L i S = Q /C = 7 C i L i S Q C L i i q i - - i C i i 1. 2. 2 2. 2 0. 9 P n L si = 100% 8 L i = / 100% 35% 25% 75% 2. 1. 2 2 2 - / 5 a 7. 05% P n L si 0. 9 L i i 1 CNY 3 CNY 0. 4 2 000
8 115 5 000 2. 2. 2 6 GDP 4 000 System Dynamics SD 7 1-1 Fig. 1 Schematic diagram of economic contribution form 2 2. 2. 1 2. 2. 3-1931 B = V I - A - 1 Δγ 10 B Δγ V A I 10 K = ΔY /ΔX 12 B B MPC K ΔX ΔY ΔX MPC K = 1 / 1 - b b 0 < b < 1 B' = B MPC 11 2 GDP
116 29 3 1 8 3. 1 2 3 9 = / 16 2. 2. 4 = / 17 = 18 16 ~ 18 C - D 3. 2 Y = AK α L β 13 Y K L A α β 10 1 Tinbergen Solow C - 2 D Y = A 0 1 + r t K α L β Y = A 0 e λt K α L β 14 r λ 3 Y = Ae λt G α K β L γ 15 Y t GDP λ G 3. 3 K M G L 3
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