Pedestrians and traffic management

The most common way a lift truck kills is by striking a person on foot. Operators can reduce the risk by driving well, but the larger gains come from the way a workplace is laid out and run: where people walk, where trucks travel, how the two cross, and what rules and technology support them. This lesson covers the principles of traffic management, the hierarchy of separation, crossings and intersections, warning technology, and the rules that both operators and pedestrians must follow.

Why separation comes first

1910.178 contains only scattered pedestrian rules, such as slowing and sounding the horn at cross aisles and keeping people out from under elevated loads, so OSHA relies on the general duty clause and industry practice for traffic management. ANSI/ITSDF B56.1 and OSHA's own guidance call for separating pedestrians and trucks where possible, marking aisles and walkways, and controlling intersections. Inspectors and courts expect separation by design, not just signs.

The hierarchy of separation

Most workplaces use a combination. A well-run distribution center might have barrier-protected walkways along the main aisles, pedestrian-free narrow aisles, gated crossings at the few places walkways cross truck routes, blue lights on every truck, a 4 or 5 mph speed limit and strict rules on phone use. Each layer catches some of what the others miss.

Designing routes

A traffic management plan starts with a drawing of the site showing where trucks travel, where people walk, and where they meet. The aim is to reduce the number of meeting points and make each one safe. Useful principles include:

• Keep pedestrian routes short and direct, or people will take shortcuts through truck areas.
• Put pedestrian routes along walls or behind barriers, not down the middle of truck aisles.
• Use one-way systems for trucks to reduce head-on meetings and reversing.
• Avoid blind corners; where they cannot be removed, add mirrors, cut-back corners, warning lights or presence detection.
• Separate entrances: people should not have to walk through a truck door to enter a building.
• Locate offices, washrooms, lunchrooms and time clocks so that reaching them does not require crossing truck routes.
• Mark aisles, walkways, crossings and stop lines clearly and keep the markings maintained.
• Provide enough aisle width for the trucks used, with clearance for turning and rear swing.

Intersections and crossings

Intersections are where most strikes happen. An operator approaching a cross aisle needs to see far enough along it to stop for a person stepping out, and a pedestrian needs the same view of approaching trucks. The sight distance required depends on the truck's speed and stopping distance.

Pedestrian crossings over truck routes should be few, clearly marked and placed where visibility is good. Gates or barriers that make pedestrians stop and look before crossing are more effective than paint alone. At busy crossings, light-controlled or interlocked systems can stop trucks or warn them when a gate opens.

Alert and warning devices

A wide range of devices helps operators and pedestrians notice each other. None replaces separation, but each can catch some of the conflicts that remain.

When adding technology, involve operators and pedestrians, test it in real conditions, and watch for unintended effects. A proximity system that alarms constantly will be ignored or disabled. A blue light that becomes part of the background no longer warns anyone.

Speed limits

Speed limits should be set for each area based on visibility, congestion and floor conditions, posted clearly, and enforced. Many sites use about 5 to 6 mph in open warehouse areas and walking pace, around 3 mph, in congested areas, near pedestrians and in buildings with poor visibility. Speed limiters built into modern trucks, or zone-based telematics, make limits reliable instead of aspirational.

Rules for operators and pedestrians

Rules cannot replace design, but they set expectations and give supervisors something clear to enforce. A typical set includes:

• Pedestrians use marked walkways and crossings and never walk in narrow aisles while a truck is working.
• Pedestrians stop at crossings, look, and make eye contact with operators before stepping out.
• No phone use while walking in operating areas, for operators or pedestrians.
• Operators slow down and sound the horn at intersections and doorways, and stop for pedestrians.
• Nobody stands in the swing zone of a turning truck or near a truck that is placing a load.
• Visitors and drivers are escorted or confined to designated safe areas such as driver waiting rooms.
• High-visibility clothing is worn by everyone in operating areas.

Right-of-way rules vary. Some sites give pedestrians the right of way everywhere; others give trucks the right of way in aisles and pedestrians the right of way on walkways and crossings. Either can work if the rule is clear, consistent and taught, but both operator and pedestrian must still act as if the other has not seen them.

Visitors, contractors and truck drivers

People who do not work at the site are at particular risk because they do not know its routes and rules. Delivery drivers waiting at the dock, contractors working near aisles and visitors on tours should receive a short orientation, be given high-visibility clothing, and be kept to safe zones. Many sites have a driver waiting area with a window onto the dock so drivers can watch their trailer being loaded without standing in the truck path. Contractors working in truck areas need the work area barricaded and a plan agreed with the site supervisor.

Writing the traffic management plan

A traffic management plan is a living document, not a one-time drawing. A useful plan contains a scaled site drawing showing routes, walkways, crossings, one-way systems, speed zones, pedestrian-free zones, parking and charging areas; the rules for operators, pedestrians, visitors and drivers; the controls at each crossing and blind spot; the equipment fleet and who may operate it; and how the plan is communicated, inspected and reviewed. It should be posted where people can see it and included in orientation for every new worker, temporary worker and contractor.

The plan should be reviewed whenever something changes: new racking, a new product line that brings more trucks into an area, a seasonal peak with extra temporary staff, construction work that closes a route, or an incident or near miss that shows a weakness. Seasonal peaks deserve special attention, because they bring more trucks, more new workers and more time pressure at the same moment.

Involve the people who use the routes. Operators know where the near misses happen, pickers know the shortcuts people take, and drivers know where they are left waiting. A short walk-through with a few of each, plan in hand, often finds problems that no drawing shows.