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Design Specifications

The DPEP is proposed to be developed as a Class A expressway based on the following Design Standards and Specification Codes.

No. Specification name Code
I FOR SURVEY & INVESTIGATION  
1 Technical standard for GPS measurement and
data treatment in topographical survey
TCXDVN 364-2006
2 Geological exploratory drilling specification 22 TCN 259-2000
3 Highway survey specification 22 TCN 263-2000
II FOR DESIGN WORK  
1 Expressway -Design specification TCVN 5729-1997
2 Highway -Design specification TCVN 4054-2005
3 Flexible pavement -design specification and guidance 22 TCN 211-2006
4 Specification for surveying and designing RC pavement 22 TCN 223-1995
5 Bridge design specification 22 TCN 272-2005
6 Road signal regulations 22 TCN 237-2001*
7 Rural road design standards 22 TCN 210-1992

Indicative Design Specifications for the DPEP are as follows.

No. Parameter Unit Index
1 Design speed Vtt km/h 120
2 Maximum super-elevation slope (isc) % 7
3 Absolute minimum radius corresponding to isc = +7% m 650
4 Desirable minimum radius corresponding to isc = +5% m 1000
5 Radius corresponding to isc = +2% m 3000
6 Minimum radius without super elevation (isc = -2%) m 4000
7 Minimum length of transitional curve corresponding to absolute minimum radius m 210
8 Minimum length of transitional curve corresponding to minimum radius m 150
9 Transition curve length relevant to radius with index in brackets m 125 (1125)
10 Stopping sight distance m 230
11 Maximum slope-up % 4
12 Maximum slope-down % 5.5
13 Minimum length of crest curve m 12000
14 Minimum length of vertical curve m 5000

For further details on the Design Specifications of the DPEP please refer

Click here to download Design Standards and Specifications of the DPEP.