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公路路線設(shè)計規(guī)范 JTG D20-2017(英文版) 1 General Provisions 12 Highway Classification and Class Selection 32. 1 Highway function and classification 32. 2 Selection of highway technical classification and design speed 52. 3 Control of access 73 Highway Capacity 103. 1 General 103. 2 Level of service 113. 3 Design hourly volume for highway 133. 4 Design capacity of motorway or Class-1 highway segments 143. 5 Capacity of interchange 163. 6 Capacity of a Class-2 or Class-3 highway 174 Overall Design 194. 1 General 194. 2 Highway function and technical criteria 194. 3 Scope of project and implementation plan 204. 4 Environmental stewardship and resource conservation 244. 5 Design checking and safety assessment 255 Highway Route Location 276 Highway Cross-sections 316. 1 General 316. 2 Traffic lane 336. 3 Median 366. 4 Shoulders 376. 5 Road crown and cross-slope 39
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