Safety at sobriety checkpoints: visibility, tactical positioning and vehicle-strike prevention

Preventive checkpoints on public roads are a routine part of operations for law enforcement agencies and local police forces. Although these interventions are standardised, they take place in dynamic environments where factors such as low ambient light, changing weather conditions and moving traffic require rigorous safety planning.

To ensure the checkpoint is conducted properly and to protect officers’ physical safety, it is essential to apply a clearly defined alcohol screening protocol. This methodology must combine orderly tactical positioning with the use of suitable high-visibility technical uniforms. In this article, we review the operational and equipment guidelines that help optimise safety during these interventions.

The importance of a structured “alcohol screening protocol”

The effective operation of an alcohol and drug checkpoint relies on operational standardisation and anticipation. A comprehensive alcohol screening protocol covers everything from the prior selection of the location (prioritising stretches with wide visibility and safe diversion areas) to the allocation of roles during the operation.

Within this operating framework, the protocol establishes three core pillars for the checkpoint:

1. Graduated signage: deploy advance warning elements far enough ahead to alert drivers early and allow a progressive reduction in speed.
2. Tactical space allocation: organise physical elements (cones, beacons and police vehicles) to channel traffic and create clearly defined working areas.
3. Compliant personal equipment: ensure that every team member has garments that guarantee long-distance visibility in any lighting condition.

Comprehensive visibility

In night-time operations or adverse weather conditions, visibility is a fundamental occupational safety factor. In this context, technical uniforms become an essential form of personal protective equipment (PPE).

Standards and reflective performance

Garments used when implementing the alcohol screening protocol must comply strictly with the requirements of EN ISO 20471 for high-visibility clothing. This requires an optimal level of contrast between the base fabric (fluorescent) and the retroreflective bands. These bands must be positioned strategically to define the wearer’s silhouette, making the officer easier to recognise through the so-called “biomotion effect.”

Tactical positioning and safety zones

Tactical positioning is the phase of the alcohol screening protocol that governs interaction with stopped vehicles while maintaining optimal operational safety distances at all times.

• Police vehicles as traffic-channeling elements: patrol vehicles should be positioned strategically to define the working corridor and shield the interview area. It is advisable to park with the wheels turned towards the outside of the carriageway so that, in the event of a rear-end collision, the vehicle is less likely to be projected into the officers’ working area.
• Positioning in the interview area: the officer conducting the test should approach from the side of the stopped vehicle (typically at B-pillar level), avoiding positions in front of the bonnet or in blind areas between vehicles.
• Ergonomics and freedom of movement: to carry out procedures effectively and react to unexpected situations, technical uniforms must provide a full range of movement.
• The use of bi-stretch fabrics prevents clothing from becoming a physical limitation.

At Partenon, we develop technical uniforms tailored to real operational requirements. Our approach to design, pattern development and individualised delivery ensures that each officer has functional, comfortable equipment that is fully aligned with visibility standards.