2009 Michigan Laws > Chapter 247 > Act 295 of 1937 – Mechanically Operated Barricading Devices Current as of: 2009 | Check for updates | Other versions § 247.311 Highways; definition § 247.312 Automatic or mechanically operated barricading devices § 247.313 Barricading devices on highway; automatic; warning signs, size, wording, distance § 247.314 Barricading devices; expense