Section size of asphalt surface layer of subgrade bed for ballastless tracks in Japan
| Surface structural layer of subgrade bed | Track category | Width of surface layer of subgrade bed/m | Standard thickness of surface layer of subgrade bed/m | |
|---|---|---|---|---|
| Type RA ballastless track | Sleeper-embedded track | |||
| Asphalt mixture layer | Standard gauge | 3.20 | 0.15 | 0.20 |
| Graded crushed stone layer | Standard gauge | 0.15 | 0.15 | |
| Surface structural layer of subgrade bed | Track category | Width of surface layer of subgrade bed/m | Standard thickness of surface layer of subgrade bed/m | |
|---|---|---|---|---|
| Type RA ballastless track | Sleeper-embedded track | |||
| Asphalt mixture layer | Standard gauge | 3.20 | 0.15 | 0.20 |
| Graded crushed stone layer | Standard gauge | 0.15 | 0.15 | |
Source(s): Authors’ own work