(a) No person shall drive a motor vehicle at such a slow speed as to impede the normal and reasonable movement of traffic except when reduced speed is necessary for safe operation or in compliance with law.
(b) On any freeway, or other highway providing for two (2) or more lanes of travel in one direction, vehicles shall not intentionally impede the normal flow of traffic by traveling side by side and at the same speed while in adjacent lanes. This subject shall not be construed to prevent vehicles from traveling side by side in adjacent lanes because of congested traffic conditions.
Source: Code 1962, § 10-9-2
State law reference--Similar provisions, R.R.S. 1943, 60-6,192 and 60-6,193.