Effective communication is of the utmost importance at this stage, as well as reflection on potential security issues. Mnemonik, METHANE, is helping officials carry out this first assessment. Officials should take into account, when crossing this stretch of road, the severity of motorway accidents on the stop lane (SH) is higher than that of the main road (MC). This paper compares and contrasts with the main factors that influence the severity of HS and MC accidents on motorways in England. When the decision to completely close a highway is made, sufficient resources must be available to ensure that it is actually implemented. A traffic police officer may take the first decision to close the motorway, but a supervisory authority and the Regional Control Centre and/or the Motorway Authority of England should be informed as far as possible so that the decision can be reviewed. If the closure is expected to be long, the motorway authority is requested to ensure that the original closure is replaced by a complete closure, in accordance with Chapter 8 of the Ministry of Transport (2006). The Motorway Traffic Regulations (England and Wales) of 1982 govern the use of motorways. Rule 16 (as amended) provides for derogations and flexibilities. Patrol police officers should be aware of these exceptions and be mindful of what partner organizations can do under these rules. . .