# Road Traffic Regulation Act 1984, 


For a vehicle falling within class 5(2)(b) above, the maximum speed while the vehicle is being driven on a part of the M9/A9 Trunk Road specified in the Schedule to the HGV Speed Limit (M9/A9 Trunk Road) Regulations 2014 is 50 miles per hour (rather than 40 miles per hour as specified in column 3(c) of the Table above).

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Source: https://www.legislation.gov.uk/ukpga/1984/27/schedule/6/part/I/crossheading/application (the official version)
Page: https://openlegislation.uk/road-traffic-regulation-act-1984/schedule-6/part-I/crossheading-application
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.