为促进公路工程行业标准的对外交流，现发布《公路路线设计规范》英文版[JTGD20—2017(EN)][代替标准号JTGD20—2006(E)]、《公路沥青路面设计规范》英文版[JTGD50—2017(EN)][代替标准号JTGD50—2006(E)]。
上述标准英文版的管理权和解释权归中华人民共和国交通运输部，日常管理和解释工作由编译单位中国路桥工程有限责任公司负责。
标准英文版与中文版在技术内容上出现异议时，以中文版为准。

1 General Provisions
2 Highway Classification and Class Selection
2.1 Highway function and classification
2.2 Selection of highway technical classification and design speed
2.3 Control of access
3 Highway Capacity
3.1 General
3.2 Level of service
3.3 Design hourly volume for highway
3.4 Design capacity of motorway or Class-1 highway segments
3.5 Capacity of interchange
3.6 Capacity of a Class-2 or Class-3 highway
4 Overall Design
4.1 General
4.2 Highway function and technical criteria
4.3 Scope of project and implementation plan
4.4 Environmental stewardship and resource conservation
4.5 Design checking and safety assessment
5 Highway Route Location
6 Highway Cross-sections
6.1 General
6.2 Traffic lane
6.3 Median
6.4 Shoulders
6.5 Road crown and cross-slope
6.6 Highway clearance profile
6.7 Land acquisition for highway reserve
7 Highway Horizontal Alignment
7.1 General
7.2 Tangent
7.3 Circular curve
7.4 Spiral
7.5 Superelevation on circular curve
7.6 Widening on circular curve
7.7 Superelevation and widening transition sections on Class-4 highways
7.8 Length of horizontal curve
7.9 Sight distance
7.10 Switchback curve
8 Highway Profile
8.1 General
8.2 Grades
8.3 Length of grade
8.4 Climbing lane
8.5 Resultant gradient
8.6 Vertical curves
9 Geometric Design
9.1 General
9.2 Horizontal alignment design
9.3 Vertical alignment design
9.4 Design of cross-section
9.5 Alignment combination design
9.6 Coordination of alignment of bridges and tunnels
9.7 Configuration of roadside facilities
9.8 Environmental fitness of highway alignment
10 At-grade Junctions
10.1 General
10.2 Highway alignment at at-grade junctions
10.3 Sight distance
10.4 Turning roadway design
10.5 Auxiliary lanes and traffic islands
10.6 Reconstruction of at-grade junctions
11 Grade-separated Junctions
11.1 General
11.2 Sight distance
11.3 Design of ramps
11.4 Basic number of lanes and lane balance
11.5 Major forks and branch connections on main routes vs.diverges and merges on ramps
11.6 The at-grade junction between an interchange ramp and an intersecting highway
11.7 Grade separations
12 Railway, Farmroad and Pipeline Crossings
12.1 General
12.2 Grade-separated highway-railway crossing
12.3 Highway-railway at-grade crossings
12.4 Highway-farmroad crossings
12.5 Highway-cable line and highway-pipeline crossing
13 Highway Roadside Facilities
13.1 General
13.2 Toll station
13.3 Service areas and rest areas
13.4 Transit bus bays
13.5 U-turns on motorways
Background to Provisions
1 General Provisions
2 Highway Classification and Class Selection
3 Highway Capacity
4 Overall Design
5 Highway Route Location
6 Highway Cross-sections
7 Highway Horizontal Alignment
8 Highway Profile
9 Geometric Design
10 At-grade Junctions
11 Grade-separated Junctions
12 Railway, Farmroad and Pipeline Crossings
13 Highway Roadside Facilities
Technical Terms in English and Chinese