Haw. Rev. Stat. § 291E-20: Minimum standards for roadblock procedures.

(a) Every intoxicant control roadblock program shall:

(1) Require that all vehicles approaching roadblocks be stopped or that certain vehicles be stopped by selecting vehicles in a specified numerical sequence or pattern;

(2) Require that roadblocks be located at fixed locations for a maximum three-hour period;

(3) Provide for the following minimum safety precautions at every roadblock:

(A) Proper illumination;

(B) Off-road or otherwise safe and secure holding areas for vehicles involved in any roadblock stop;

(C) Uniformed law enforcement officers carrying proper identification;

(D) Adequate advance warning of the fact and purpose of the roadblocks, either by sign posts, flares, or other alternative methods;

(E) Termination of roadblocks at the discretion of the law enforcement officer in charge where traffic congestion would otherwise result; and

(4) Provide for a sufficient quantity and visibility of uniformed officers and official vehicles to ensure speedy compliance with the purpose of the roadblocks and to move traffic with a minimum of inconvenience.

(b) Nothing in this section shall prohibit the establishment of procedures to make roadblock programs less intrusive than required by the minimum standards provided in this section.