Short answer: The right barrier system for a car park or facility entrance is chosen by planning the following together: a 3–6 m boom length to suit the lane width, an opening time (approx. 1–6 s) and 100% duty cycle to suit traffic density, an articulated boom for indoor car parks, two-layer safety consisting of a loop detector and photocell, and integration with number plate recognition or card access.
Barrier systems are the most visible and most frequently used equipment for managing a facility's vehicle traffic. At a shopping centre car park, a residential complex entrance or a factory gate, a barrier opening just a few seconds late can turn into queues spilling onto the street at peak times. This article looks at the barrier not as a security product but as a traffic and facility management tool: density analysis, lane planning, integration and operation. For series and technical specifications, take a look at our automatic barrier systems page.
How do you choose a barrier according to entrance traffic density?
The first question in barrier selection should not be "how many vehicles pass per day?" but "how many vehicles pass in the busiest hour?". Queues do not form at the daily average; they form at the morning start of work, at the end of the working day or during weekend shopping hours. This peak density determines the opening time, the number of lanes and the required speed of the verification method.
In Pack Door barriers, a 24 V brushless DC motor and an encoder-controlled control board move the boom with soft start and stop and without vibration. A 100% duty cycle means the barrier can operate continuously in heavy traffic without needing a cooling break. The series differ in opening time and boom length:
| Series | Opening time | Boom length | Suitable use |
|---|---|---|---|
| PD Gate Fast (high-speed) | Approx. 1–1.5 s | 3–4 m, LED-lit | Shopping centre and airport car parks, toll and payment points |
| PD Gate Standard | Approx. 3–4 s | 3–5 m aluminium | Residential complexes, factories and industrial zones, office car parks |
| PD Gate Long (long boom) | Approx. 4–6 s | 5–6 m, with support post | Logistics and factory entrances, lorry parks, wide residential entrances |
| PD Gate Fold (articulated) | Depends on series and boom | 90° articulated folding boom | Indoor and basement car parks, low-ceiling entrances |
The longer the boom, the longer the opening time; so at a wide entrance, installing two lanes with two standard barriers instead of a single long boom often provides smoother traffic flow. On long-boom models, a boom skirt and support post restrict pedestrian or motorcycle passage under the boom and stabilise it against the wind.
How are entry and exit lanes planned?
A barrier's performance is directly related to the geometry of the lane in which it is installed. A good lane plan ensures that vehicles approach the barrier straight and slowly, and that vehicles waiting behind during verification do not block street traffic. The following steps are followed in planning:
- Collect peak-hour data: If no records exist, entry and exit counts are observed over a few days.
- Calculate the waiting area: A queuing space for at least a few vehicles is left between the barrier and the street.
- Determine the lane width: Lane width determines boom length and series; lorry and truck entrances require the long-boom series.
- Separate entry and exit: Where possible, entry and exit are managed in separate lanes with separate barriers; a separate lane for visitors is considered.
- Position the verification point: The number plate recognition camera, card reader or ticket machine must be within reach of the driver without getting out of the vehicle.
- Check the ceiling and obstacles: In indoor car parks, ceiling height, service pipes and sprinkler lines are measured; an articulated boom is chosen if necessary.
The most common problem in indoor and basement car parks is a standard boom hitting the ceiling or services as it opens. An articulated (folding) boom folds 90° in the middle as it opens, so it can operate even with a low ceiling height.
Which systems does a barrier integrate with?
A barrier is only as fast as the verification system that controls it. The barriers in our range integrate with number plate recognition (LPR), RFID/UHF card access, remote control, QR or ticket systems and car park payment software. The choice is made according to the user profile:
- Residential complexes: Number plate recognition for residents' vehicles, time-limited permits or intercom approval for guests.
- Office buildings: Car park management integrated with staff cards; floor- and subscription-based authorisation.
- Shopping centre and hospital car parks: Ticketed or QR-code entry, payment point and high-speed barrier.
- Factories and industrial zones: Separate authorisation for staff and supplier vehicles, security gatehouse approval.
- Logistics centres: Lorry and truck access with a long-boom barrier, number plate checks matched to the booking system.
Long-range UHF cards and number plate recognition let vehicles pass almost without stopping, which shortens queue times at busy entrances. On the management software side, functions such as reporting entry and exit records, car park occupancy tracking and subscription management should also be planned from the outset.
How is safe and uninterrupted operation ensured?
Barrier safety is designed in two layers: the loop detector under the ground senses the vehicle and prevents the boom from coming down onto it, while the photocell creates a second safety line. An LED-lit, reflective boom increases night-time visibility; a traffic light and audible warning can be added as options. A breakaway boom connection protects the mechanism if a vehicle hits the boom.
A battery backup unit is recommended for continuity; the barrier keeps working during a power cut. Without a battery, the boom can be raised by hand using the manual release key on the housing. The housing is made of electrostatically powder-coated galvanized steel or stainless steel; this finish is important for long service life outdoors.
Note from the field: A significant share of barrier complaints stems from incorrectly positioned loop detectors. When loop cables are laid too close to or too far from the barrier, detection gaps occur, especially with high-chassis vehicles and trucks with trailers. During the site survey we note the types of vehicles that visit the facility and adjust loop sensitivity and photocell height to suit them. Damage to loop cables after asphalt resurfacing is also common; we recommend notifying the barrier service team before road works.
Common mistakes
- Choosing based on the daily average: Queues form at peak times; selection should be based on peak data.
- Using a standard boom in an indoor car park: The boom hits the ceiling or services; an articulated boom is required.
- Not leaving a waiting area: Vehicles waiting during verification block street traffic.
- Treating a barrier as a security obstacle: A boom barrier regulates traffic; where physical stopping is required, bollard systems should be considered.
- Not having a breakdown response plan: How the entrance will be managed during a barrier failure and the service response time should be clarified from the start.
Frequently asked questions
Can the barrier boom come down onto a vehicle?
No. The boom will not come down as long as the loop detector and photocell detect the vehicle. This two-layer safety prevents damage to both vehicle and boom; settings are adjusted to vehicle type during installation.
Which barrier is suitable for an indoor car park?
Because the ceiling height is low, an articulated boom barrier that folds in the middle as it opens is used. Boom length, lane width and ceiling height are measured during the site survey.
Does the barrier open during a power cut?
Barriers with a battery backup unit keep working during an outage. Without a battery, the boom can be raised by hand using the manual release key on the housing.
Does the barrier work with number plate recognition?
Yes. The number plate recognition camera identifies authorised vehicles and raises the boom automatically, records are reported in the software and time-limited permits can be set up for guests.
Conclusion and next step
Smooth traffic at car park and facility entrances is achieved with a series chosen for peak demand, the right lane geometry, a fast verification system and two-layer safety. Drawing on the experience of 15,000+ projects, we observe your entrance's traffic flow on site and draw up the lane and barrier plan together with you. Send us your free site survey request; with our service network across all 39 districts of Istanbul, we can also plan after-installation support.
