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Table 16.1 : Design Standards for Philippine National Highways
ADT (Average Daily Traffic)
U~der 200
Minimum
200 - 400
Minimum
90
90
70
400 - 1000
Minimum
Desirable
1000 - 2000
Minimum
Desirable
More than 2000
Minimum
Desirable
DESIGN SPEED (kph)
Flat Topography
Rolling Topography
Mountainous Topography
70
30
Flat Topography,
Rolling Topography
Mountainous Topography
375
195
25
30
90
70
40
90
80
50
90
70
40
100
80
60
90
70
40
100
375
250
75
375
195
45
490
250
115
375
195
45
490
335
115
3.0
5.0
6.0
4.0 (Max.)
5.0 (Max.)
7.0 (Max.)
3.0
5.0
6.0
4.0 (Max.)
5.0 (Max.)
7.0 (Max.)
3.0
4.0
5.0
2 x 3.5 1 7.0
2.5 (1.5 Paved)
2.5 (1.5 Paved)
90
60
RADIUS (meter)
375
195
25
375
195
45
GRADE (%)
Flat Topography
Rolling Topography
Mountainous Topography
6.0 (Max.)
8.0 (Max.)
10.0 (Max.)
6.0 (Max.)
7.0 (Max.)
9.0 (Max.)
5.0 (Max.)
6.0 (Max.)
8.0 (Max.)
CROSS SECTION (meter)
Traffic Lane Width (m)
Shoulder Width (rn)
Right Of Way Width (m)
Superelevation (m/m) - Flat
Superelevation (m/m) - Rolling
Superelevation (m/m) - Mountainous
1 x 4.0/4.0
2 x 3.1/6.2
0.5
1.0
20
30
0.06 (Max.)
0.08 (Max.)
0.10 (Max.)
2 x 3.1 1 6.2
1.5
2.0
2 x 3.3/6.6
2.5
2 x 3.517.0
60
0.06 (Max.)
0.08 (Max.)
0.10 (Max.)
30
0.06 (Max.)
0.08 (Max.)
0.10 (Max.)
30
0.06 (Max.)
0.08 (Max.)
0.10 (Max.)
3.0 (1.5 Paved)
STOPPING (NON - PASSING) SIGHT DISTANCE (meter)
Flat Topography
Rolling Topography
Mountainous Topography
160
105
35
160
105
35
160
105
50
160
130
65
160
105
50
185
130
85
160
105
50
185
160
85
630
440
160
725
540
350
630
440
160
725
630
350
SAFE PASSING SIGHT DISTANCE (meter)
Flat Topography
Rolling Topography
Mountainous Topography
630
440
70
630
440
70
Gravel, Crushed Gravel or Stone,
Bituminous Preservative Treat.
Single or Double Bit. Treatment,
Bituminous Macadam Pavement
May 2004
Road Safety Design Manual
630
440
160
630
540
250
SURFACE TYPE
Bituminous Macadam Pavement,
Dense or Open Graded Plant Mix,
Bit. Concrete Surface Course,
Portland Cement Concrete
Bituminous Concrete Surface
Course
Portland Cement Concrete
Pavement
Bituminous Concrete Surface
Course
Portland Cement Concrete
Pavement
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