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Stopped Vehicle Detection Radar

The SVR-500 intelligent radar sensor scans the full 360 degrees every second to rapidly detect stopped vehicles and debris. It measures a vehicle's range and instantaneous speed on each scan, avoiding the need for error-prone tracking routines. The detection zones are configured easily to cater for the different carriageways, slip roads, emergency areas and hard shoulders, as well as defining areas of no interest. In addition to reporting location data for the stopped vehicle, the SVR-500 can take automatic control of a CCTV camera, pointing it at the incident. This reduces operator workload for the fastest response.

  • Total coverage 500 metres
  • Rapid detection - typ. <20 seconds
  • High detection probability
  • Low false alarm rate
  • All weather performance
  • Scans all carriageways
  • Minimal blind spot underneath sensor
  • Detects all types of car, van, truck & motorcycle
  • Operates 24/7
  • Can be installed at height
  • Accurate position reported
  • Automatic control of PTZ camera
  • No external signal processing required
  • Low cost - No annual licensing fees
  • Quick to install at road side
  • Easy to commission
  • Intuitive user interface
  • Power-over-Ethernet (PoE)
  • Optional 24V DC power
  • Designed, developed and manufactured in the UK

photo of svr-500

The SVR-500 radar operates autonomously using self-contained detection and processing hardware. There is no need for external signal processing equipment, thereby minimising the complexity and communication requirements. Single-point failures are mitigated because each radar operates independently. To see over tall vehicles, SVR-500 can be mounted 10 metres high. Vehicles that stop almost directly below the radar are also detected due to the fan-beam antenna.

The equipment uses a number of innovative technologies to provide very high performance at a low cost. The core 24GHz radar hardware has been developed and proven over many years of trials in highway and other environments to provide a high reliability under the most demanding of conditions. Our radar operates in all weather conditions and in any light level, therefore overcoming the operating issues that affect LIDAR and optical sensors.

Operating frequency band 24.05 - 24.25 GHz (license exempt ISM band)
Technology FMCW Radar
Transmitted power +20 dBm (100 mW) EIRP
Polarisation Linear
Scan-rate 360 degrees per second (1 Hz)
Maximum range 250 metres in all directions (500 m total)
Maximum blind zone 15 metres radius when mounted at 10 metres height
Azimuth beam width 2.2° (combined Tx & Rx)
Elevation coverage Fan beam +2° to -30° nominal
Angular resolution 1.3°
Range resolution 1 metre
Detection zones Multiple free-form, user defined
Network Ethernet, 100 Mbps, RJ45 port
Power supply voltage PoE (802.3af or at) or optioanl 24V DC.
Power consumption 11 W nominal (up to 100 W if heaters fitted)
Timekeeping Internal real-time clock.
Back-up provides >48 hour power retention during power outage
Dimensions 332 mm diameter max x 310 mm tall (ignoring studs/connectors)
Weight 3.3 Kg
Fixings 4 off M6 studs on a standard 101.6mm (4 inch) PCD
Operating temperature -20°c to 55°c (-40°c with heater option installed)
RF hazard None (<0.5mW/sq cm average power at antenna)
Approvals EN300440, EN301489, IEC60950.
Routine maintenance None required
RF Hazard None (<0.5 mW/sq cm average at antenna)

   If you have special requirements for alternative physical interfaces or power supplies please contact us and we will investigate the feasibility of your request.

Ogier Electronics reserve the right to alter specifications without notification.

Click on question to reveal answer or click here to reveal all.

Azimuth is the horizontal angle around a fixed reference point, typically measured from 0 to 360 degrees.

Beam width is a figure-of-merit used to compare antennas.
Beam width is measured as the angle between the half-power (-3 dB) points referenced to the peak power on boresight (centre of beam).

Clutter refers to objects that cause unwanted reflections to be seen by radars. Grass, bushes, trees, water, parked cars, posts and buildings are all sources of clutter. High levels of clutter can cause performance issues with radar systems, especially if the clutter moves.

This is a software program. With the camera under test connected to your computer, this software will check the compatibility of the camera with our radar. The generated report should be emailed to us for verification.

Equivalent Isotropic Radiated Power.
EIRP allow direct comparison between antennas with different beam widths by showing the hypothetical power that would need to be transmitted in all directions (isotropic) to have the same transmitted power as the antenna's strongest direction. Telecommunication regulatory bodies usually state maximum permissible transmission power levels as EIRP.

Elevation is the vertical angle above or below fixed reference plane, typically measured from -90 to +90 degrees.

FM stands for frequency modulation. CW stands for continuous wave. Continuous wave radars constantly transmit a signal, the opposite to pulsed radar. CW is ideal for short ranges. To measure target range without using pulses, the transmitted CW frequency is modulated (shifted up and down), hence FMCW.

License exempt means the equipment conforms to regulations that permit operation without the user first obtaining a license from the relevant radio regulation authority.

Linear polarisation refers to the orientation of radio waves as they travel through the air. Linearly polarised waves are orientated in a straight line at a fixed angle, often horizontal or vertical. Compare to circular polarisation where the radio waves appear to corkscrew through the air. Linear polarisation is normally used when the transmitter and receiver cannot be independently rotated. Circular polarisation is often used for weather radar to measure raindrops and satellite communication when the satellite position is not fixed in the sky.

This is an industry standard which defines protocols for IP PTZ camera interfacing

A Profile S ONVIF device sends video data over an IP network to a Profile S client such as a VMS.

A radome is a protective plastic cover that allows microwaves to pass through but prevents water from entering the radar.

Summary of applicable standards:

EN300440 describes performance requirements and conformance test procedures for licence exempt Short Range Devices (SRDs) intending to use frequency bands within the range of 1 GHz to 40 GHz. It defines technical requirements to support the essential requirements of the Radio Equipment Directive that states "Radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference".

EN301489 details the Electro-Magnetic Compatibility (EMC) requirements and tests for radio communications equipment. It specifies the applicable EMC tests, the methods of measurement, the limits and the performance criteria.

IEC60950 is a safety standard for information technology equipment. The standard covers internal components, protection against electric shock, mechanical safety, temperature and electric performance and connection for electric communication circuit.

Radar expertise runs deep at Ogier Electronics, with senior engineers collectively having more that 50 years experience in cutting-edge military radar and electronic warfare systems, including missile seekers, microwave target identification, airborne radar warning, radar jamming and radar deception.
This has helped us to apply many advanced concepts in our low cost commercial radars.

Shown below is a brief history of key milestones for our radar products:

  • 2012: Scan-360 project started
  • 2012: Field measurements made using prototype.
  • 2013: Radar re-designed into production form.
  • 2014: Scan-360 public launch at Intersec, Dubai.
  • 2014: Radar demonstrated with integrated camera system at Ifsec, UK.
  • 2014: First customer trials and demonstrations.
  • 2015: User interface improvements based on customer feedback.
  • 2015: Frequency modulation improved to reduce false alarm rate.
  • 2016: Fixed (non-scanning) static radar products launched.
  • 2017: TCP/IP interface to support Onvif cameras.
  • 2017: Drone detection capabilities demonstrated.
  • 2017: Investigation started on substantial improvements to antennas.
  • 2017: Stopped Vehicle Detection (SVD) investigation started.
  • 2018: Scan rate doubled to improve detection probability.
  • 2018: Scanning radar motor improvements for extremely long operating life.
  • 2018: Power-over-Ethernet capability as standard.
  • 2018: Demonstration of radar operation over water, tracking boats on river Thames.
  • 2018: Start of phase 1 long-term motorway trials.
  • 2019: Multiple-target tracking capability released.
  • 2019: Improved antenna arrangement to enhance close-in detection capability.
  • 2020: Improvements to radar resolution and doubling of measurement rate.
  • 2020: Improved antenna azimuth beam width based on analysis of phase 1 trial data.
  • 2020: Launch of unique dual-technology static radar system.
  • 2020: Start of phase 2 long-term motorway trials.
  • 2021: Substantial signal processing enhancements using faster microprocessors.
  • 2021: Improvements to built-in self-test system.
  • 2021: Formal product launch of SVR-500.
  • 2021: SVR-500 live demonstration at overseas customer test site.

To design, manufacture and support high performance reliable radar sensors a range of advanced in-house technologies have been developed:

computer simulation
Computer simulations have been developed and verified against field measurements to assess the impact of design changes and to explore optimisations for particular radar applications.
Simulation models cover a variety of techniques from physical modelling and geometry to electrical network analysis and Fourier transforms. The modular approach means real or simulated data can be injected at various points to evaluate the overall system performance.

antenna design software
Antenna design methods, refined over a number of years, give predictable performance to suit different requirements. For SVD, enhanced detection probability at close range (fan beam) and reduced false alarms (low sidelobes) were key optimisations.

radar algorithms
Investigations into a number of unusual signal processing routines has produced novel algorithms that allow us to utilise inexpensive microprocessors within the radar sensor, rather than relying on costly external processing hardware.

gps satellite
Development of precision timing and synchronisation system guarantees multiple SVD radars operating in close proximity will not interfere with each other, even if they have direct line of sight. In most applications where the sky is visible this system will automatically use signals received from orbiting GPS satellites to maintain timing lock.

data display
Development of target generator test fixture ensures highly repeatable "hardware-in-the-loop" test sequences that fully exercise the complete system to ensure consistent product performance.
Every production radar is tested using this equipment.
Regression testing is also undertaken against engineering development models to detect any subtle problems that would be hard to measure if only tested on outdoor test ranges where the environment and weather frequently change.

Cost Effective

The radar incorporates the firmware required for integration and control of a compatible ONVIF compliant PTZ camera. Radar output data is documented and avaiable to use with other systems via standard interfaces.
No external signal processing equipment is required for the radar to function.
There are no hidden costs and no annual licensing fees.

Simple Installation

Road-side work is kept to a minimum to reduce the duration of any lane closures.
The radar is easier to mount than a standard PTZ IP camera because it is typically lighter and has no external moving parts. It uses the standard 101.6mm PCD mounting arrangement used by professional CCTV cameras so off-the-shelf brackets are readily available.
There is no need for time-consuming precise adjustments to match the slope of the road because of the wide elevation coverage of the SVR-500 fan-beam antenna.

radar installation

Only very approximate alignment is necessary during installation as fine tuning can be done later using software, away from the road side. The radar only requires a network cable connection and optional 24V DC power supply to operate.

user interface screenshot

Quick Commissioning

The commissioning process, which includes the precise configuration of the radar coverage areas to match the road geography and the configuration of a paired PTZ camera (if required) is done in the back office over the network using a simple, intuitive GUI interface on a web browser, which normally takes less than an hour in total.

live radar data overlay

A satellite map is displayed to aid the definition of carriageways and emergency stopping areas.
Radar location and orientation can be confirmed by checking the live radar data corresponds to the topography of the location.
The brightness of the display can be adjusted to make it easy to pick out fixed parts of the landscape.

Moving vehicles appear as moving bright dots so the relative position and extent of carriageways is obvious at a glance. Using this procedure it is very quick and intuitive to confirm the detection areas are correct.
live view showing moving vehicles

If a camera needs to be controlled by the radar a simple alignment technique is available. Simply point the camera at a prominent feature such as a lamp post then select the same feature on the live radar data plot. The radar will then know exactly how to pan the camera to point in the correct direction.
Lamp posts appear as bright spots that do not move, so are easy to distinguish from moving vehicles.

Processing Concept

The vehicle's speed is measured on every scan, avoiding the need to maintain accurate tracking from scan-to-scan. This reduces the errors that occur when a vehicle is temporarily obscured behind another vehicle, which can reduce the detecion probability and increase the false alarm rate.
The system detects large debris and stray objects, such as traffic cones, that present a hazard to vehicles. 100% of the signal processing is performed by each radar sensor allowing low bandwidth communication infrastructure to be utilised, ideal for mobile systems.

Operating Frequency

By using the Worldwide license-exempt 24 GHz ISM frequency band there are no annual license fees to pay. Vehicle-fitted adaptive cruise control radars use a standard frequency band at 77GHz, so there is no interference between the two systems.
24 GHz radar signals are able to see through smoke even within tunnel environments.

Blindspot Elimination

Unlike other automatic incident detection systems that have large blindspots, SVR-500 has no need to infer the presence of vehicles, thus eliminating a major source for missed detections and false alarms.
Due to the special antenna arrangement the radar positively detects objects at extremely close range (almost directly underneath the sensor) so the blindspot is effectively eliminated.
Additionally, the antenna beam shape is designed to cope with height variations of the road, eliminating the need for precise mechanical tilt adjustments during installation.

blindspot with different antenna types

Temporary Traffic Mangement

Currently, most Temporary Traffic Management (TTM) systems rely on humans watching banks of CCTV monitors to manually spot breakdowns and collisions. This requires a large number of fixed cameras as well as impossibly high human vigilance.

TTM systems using SVR-500 radars automatically monitor all lanes including contra flows. When SVR-500 detects a stranded vehicle, it automatically moves a PTZ camera to point at the affected area. An alert message is generated showing the precise location alongside video footage to determine the nature of the incident.

Compared to 24-hour manned CCTV, SVR-500 is more cost effective and more reliable with high detection probability and excellent system availability. Rather than having teams of people continually staring at screens, SVR-500 allows a single Traffic Safety and Control Officer (TSCO) to oversee many kilometres of roadworks.

The radars do the hard work, leaving the TSCO to focus on the incident at hand to restore traffic flow in a timely and safe manner.

roadworks with contra flow

Data outputs

Standard data interface is Ethernet using HTTP, SSL or SSH protocols.
The basic data requirements are low:
     4 kB per alarm event to send position and time stamp.
     2 kB to provide the built in test results (if required)

Additional pan, tilt and zoom data can be provided to drive a local camera onto the stopped vehicle. Raw data can also be output although this will only be necessary in exceptional circumstances or for special applications.
The output data from each radar sensor can be customised to integrate with third-party equipment, such as traffic management systems and smart motorways for partial or full autonomy.
Data formats and APIs are fully documented.
Other interface types are available upon request.

Video clips

Introduction to SVR-500 capabilities and performance

Video demonstration of SVR-500 rapid reaction time (from phase 1 trials)

SVR-500 operating at night during heavy rain (from phase 2 trials)

   Click here to view all videos in playlist

SVR-500 logo


  • Bridges
  • Tunnels
  • Emergency refuge areas
  • Debris & object detection
  • Temporary Traffic Management
  • Roadworks breakdown detection
  • Smart motorways
  • Elevated highways
  • Clearways & red routes
  • All Lane Running (ALR)
  • Hard shoulder & breakdown lanes
  • Accident hotspot monitoring
  • Automatic Incident Detection

Radar Advantages

Not affected by fog, rain, mist or snow

Not affected by smoke, fire, heat haze or hot gas

Not affected by wet roads or water spray from vehicles

Not affected by light level (works in total darkness & bright sunshine)

Long range operation compared to other technology

Extremely low network data usage

Low false alarm rate

Minimal maintenance required

all weather

Compared to other technologies, microwave radar offers a true "all weather" capability.

Continual Improvement

We operate a continual improvement programme using real world testing to refine our systems for optimum performance.

2012: Prototype radar tested
2014: Start of customer field tests and evaluation for security applications (including vehicle detection and tracking)
2017: Private test site established on disused runway to evaluate SVD algorithms in controlled environment
2019: Phase 1 SVD motorway trials on public road network
2020: Phase 2 SVD motorway trials showing experimental inverted mounting arrangement
2021: Off-road testing on private test track


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