22TCN 171-87 PDF

Prior - Viability researching report was approved by Minister in May, This route always serves one of the greatest amount of traffic all over Vietnam. The projects has complied with route directions, cross-section scale, scale and location of bridges and intersections in project plan as well as in assessment report by Ministry of Transports. Your internet browser has disabled JavaScript. Website only work when it enable. To see how to enable JavaScript, Please click here!

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Technical Criteria on the Design of. Ministry of Transport. Standard for soil investigation and treatment design for embankment stabilization. Standard for Cone. The other elements of cross section can be narrowed where allowed; , the difference should be not significant and the transition section must be provided. The future year is defined as the 20th year after putting into operation of the newly-built highways and the 15th year for the rehabilitation ones.

For other types of pavement, all slits must be less than 10mm. The master plan shall take full or most use of the works built in previously staged construction.

Roadbed must be compacted to the standard density rate as given in Table It is necessary to prune down shrubs, prune off branches, replace the dead ones and trim the top of shrubs so that their height will not be over 0.

At intersections with the pavement markings for pedestrian crossings, bus stop must be placed at least 10m away from that crossing. However, it must not be larger than the roadbed width.

Following materials can be used for pavement markings: To see how to enable JavaScript, Please click here! In the case of highway design involving other works such as: The probability of calculating flood flows is as follows: No obstacle, including highway facilities such as road signs, lighting poles, etc. The scope of application of at-grade intersection is given in Table When the separating bands is from 3.

On the superelevated section, the change in cross slope from the cross section with adverse crown to the cross section with the full rate of superelevation can be done by two steps, follows: Safety devices on highways Then, revolving the traveled way and stabilized shoulder part about the center line profile to the full rate of superelevation; b The convex side of the curve 22cn revolved about the centerline profile to the cross slope of traveled way similar to method a.

The bicycle lane is for one-way traffic and it is placed on the right hand of the outer motorized lane. It is calculated in meter by the formula: All obstacles must be removed in order to ensure that the height of obstacles is 0.

Roadbed structure with stabilized shoulder and without stabilized shoulder 4. To this end, 22tdn the elements of the highway and the highway itself and the surrounding landscape should be coordinated harmoniously. However, its dimension must not be less than 15cm. These solutions must be fit with the highway category, structural works and geological condition of the highway location. It may include following services, which are managed by local authorities: Toe of slope downstream must be rock blocks with the ability of scouring protection.

Plantings, earth walls or noise barriers made of other materials must be designed and constructed when necessary for the reduction of noise and dust. The rest areas serve the following purposes: They can be planted on both sides along the roadway or made into a clump of trees beside the road. It traffic load to the roadbed. Connection joints between roads and bridge spans should be appropriately designed, to ensure smooth and safe conditions for vehicles entry and exit. Buses decelerate or accelerate right on the outer lane; — Separating stops: This parameter should be selected adequately but it must be: Digging pits must be designed with a complete geometric form that will not be detrimental to the surrounding landscape and can be used after completing the 22tch when necessary.

Guide posts are placed on soil part of shoulder. R — curvature radius of a point on the clothoid, in meter; L — length of the arc from the beginning of the curvature to the considering point; in meter; A — curvature parameter. High trees should be grown at parking areas to provide the shadow zones. It is a continuos yellow or white color stripe, 20cm wide, placed on the stabilized shoulder and close to the edge of pavement.

Berms may be provided at high slopes for planting shrubs. Buses stops on the outer lane, and the shoulder is used for loading; — avoiding stops: Parking areas for cars, trucks and buses are provided. Railings must extend the protection areas by at least 10m on both sides. Special attention 22tvn be paid to the selection of highway location, because the highway will exercise a great and lasting influence over surrounding environment.

Design and Handling Design Process on weak ground with absorbing rush. The selection of seed species must follow consultation with agronomists, and combination various grass varieties should be considered so as to ensure year-round greenery.

Both sides of overflow and underwater roads must have traffic signals, and indicators of water level for crossing. The gradient of intercepting ditch should be well fit with terrain characteristics, but its value must not be less than 0. Signs that are no longer of use must be promptly removed. This website uses cookies to improve your experience while you navigate through the website.

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Technical Criteria on the Design of. Ministry of Transport. Standard for soil investigation and treatment design for embankment stabilization. Standard for Cone. Even in the bad weather conditions, dust, bad light This traffic volume is used for determining the number of lanes, assessing the quality of traffic flow, traffic control, 22tcj. Artificial lighting may be considered at the following places: The traffic volume of redirected vehicles is quite light and can be routed to the adjacent intersections.

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22TCN 171-87 PDF

Technical Criteria on the Design of. Ministry of Transport. Standard for soil investigation and treatment design for embankment stabilization. Standard for Cone. The other elements of cross section can be narrowed where allowed; , the difference should be not significant and the transition section must be provided. The future year is defined as the 20th year after putting into operation of the newly-built highways and the 15th year for the rehabilitation ones. For other types of pavement, all slits must be less than 10mm.

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