Design speed (km/hr)

30

40

50

60

70

80

90

100

110

120

130

140

Maneuver speed (km/hr)

25

30

35

40

50

50

60

60

70

80

80

80

Deceleration (m/sec2)(1)

4.3

4.3

4.3

4.3

4.2

4.1

4.0

3.9

3.8

3.7

3.7

3.7

Maneuver time (sec)

4.5

4.5

4.39

4.28

4.17

4.06

3.94

3.83

3.72

3.61

3.50

3.50

DSD design values (m)

80

110

135

160

190

220

255

290

325

360

400

440

DSD type C (AASHTO [9] )(2)

85

115

145

170

200

230

270

315

330

360

390

420

DSD type D (AASHTO [9] )(3)

95

125

170

205

235

270

315

355

380

415

450

485

DSD: McGee [8]

-

120 - 160

-

170 - 230

-

230 - 310

-

310 - 400

-

360 - 470

-

420 - 540