Regulation 2 Abnormal loads
No person shall, except with the permission of the crossing operator, take or cause or permit to be taken into the tunnels, any vehicle which, together with its load and any trailer drawn by it, exceeds any of the dimensions or weights set out in the following table–
| Overall height | 4.87 metres |
| Overall length | 18.3 metres |
| Overall width | 2.75 metres |
| Total weight | 38,000 kilograms |
| Axle weight | 11,180 kilograms |
| Wheel weight | 5,090 kilograms. |