Toyota Safety Sense (TSS) is Toyota’s own suite of active safety and driver-assistance technologies designed to either prevent or mitigate accidents involving vehicles.
From its introduction in 2015, TSS has been enhanced through successive generations. In this article we explain how each update has expanded the capabilities and real-world effectiveness of these technologies. But we also reveal how the system was rapidly democratised so that TSS became a standard feature across the entire Toyota range. Why? Because it is our ultimate goal to completely eliminate road traffic accidents.
2015> Toyota Safety Sense introduced
Toyota Safety Sense was launched in March 2015 and introduced in 68 countries and regions throughout the globe. At the heart of the new system was a front-facing camera located inside the car at the top of the windscreen. Analysis of this live feed provided two core active safety functions – Pre-Collision System and Lane Departure Alert.
Some models increased the scope of the camera to provide Automatic High Beam and Road Sign Alert functions. Meanwhile, models equipped with millimetre-wave radar at the front of the car combined both sources to expand the functionality to include Adaptive Cruise Control and pedestrian recognition within the Pre-Collision System.
In Europe, TSS was integrated into contemporary models such as the Aygo, Yaris, Auris and Avensis. By the end of 2015, some 70% of all new Toyota passenger cars in Europe could be equipped with TSS; and by 2017 this democratisation had increased to 90% for customers in Japan, the United States and Europe.
Within just three years, more than eight million Toyota vehicles worldwide had been fitted with TSS. Independent studies in Japan showed the technologies had directly contributed to a significant decrease in rear-end collisions.
2018> Toyota Safety Sense 2.0
The second generation of Toyota Safety Sense was introduced in January 2018 and adopted as standard equipment in all European models introduced from that point onward.
TSS 2.0 retained the same valuable features as before but featured significant hardware upgrades. These included a smaller yet more powerful single-lens camera for improved packaging, and new millimetre-wave radar that offered increased recognition capabilities and greater accuracy. Thanks to these advances, the Pre-Collision System was now able to detect vehicles and pedestrians at night, and detect cyclists during daytime.
In addition, advanced driving support was introduced through a new Lane Trace Assist function. This technology actively supported the existing Lane Departure Alert warnings by applying gentle physical steering inputs to help keep the vehicle centred in its lane when Adaptive Cruise Control was active. Even if the camera could not detect lane markings on the road ahead, the system could use its camera and radar feeds to follow the path of the preceding vehicle.
2019> Toyota Safety Sense 2.5 and 2.5+
Intermediate updates of the second generation Toyota Safety System were introduced between 2019 and 2021. Specific refinements were not publicised but are thought to include improved curve speed management within Adaptive Cruise Control, enhanced steering assistance during emergency manoeuvres, and improved pre-collision responsiveness, particularly in the realm of pedestrian and cyclist detection.
Adoption of TSS in Toyota vehicles continued to accelerate rapidly. A year after the launch of the second generation system, ten million vehicles had been equipped with TSS. But by mid-2022, official figures showed that some 32.5 million vehicles were now equipped.
2023> Toyota Safety Sense 3.0
The current, third generation of Toyota Safety Sense represents the most significant evolution of this suite of technologies with broader detection capabilities and enhanced driver support.
Once again it is the application of improved hardware – higher resolution and wider angle front-facing camera, and new millimetre-wave radar sensor with a longer and wider field of view – that forms the foundation for the system’s increased ability to prevent or mitigate accidents. What’s more, this latest generation offers over-the-air updates, so the systems can be remotely upgraded as easily as an app on a smartphone.
The following bullet points detail the core subsystems of the latest TSS suite and highlights the improvements that third-generation technology has brought to these functions.
- Pre-Collision System. This technology scans the road ahead for vehicles, pedestrians and cyclists and recognises when there’s a possibility of a collision. If such is detected, the driver is alerted with audio and visual warnings, and if they fail to react in time the brakes automatically engage to prevent or mitigate a collision. TSS 3.0 offers enhanced detection at junctions and can sense vehicles approaching from the side.
- Road Sign Assist. This technology monitors the road signs ahead and displays useful information such as the current speed limit or overtaking restrictions on the instrument panel. The system also provides visual and acoustic warnings if the driver is not following a road sign indication. TSS 3.0 has the ability to recognise even more signs, particularly warning signs.
- Intelligent Adaptive Cruise Control. This system keeps your vehicle at a minimum pre-set distance from the vehicle in front. If this distance decreases, the system reduces your speed and eventually applies the brake, with brake lights activated. It can also bring your vehicle to a complete stop should the preceding vehicle stop ahead. TSS 3.0 now offers four pre-set distance settings. It can detect the speed of vehicles in adjacent lanes and smoothly adjust your vehicle’s speed to match theirs when the driver signals an intention to change lanes. The system is also designed to improve passenger comfort by gauging the size and severity of approaching bends and gently decelerating the vehicle so that lateral G-forces remain constant.
- Lane Trace Assist. This system is designed to make motorway driving safer by keeping the vehicle centred in its lane. If the vehicle starts to drift out of that lane, the assistance system will gently steer the car back into its correct course. TSS 3.0 has enhanced this technology to also detect three-dimensional objects, such as guard rails on the side of the road, to help keep the vehicle within its intended lane.
- Automatic High-Beam. This system optimises visibility during night driving. It uses the front-facing camera to detect the lights of oncoming vehicles and leading traffic, while also monitoring the brightness of street lights. It switches automatically between high beam and dipped headlights for safer night-time driving.
- Emergency Driving Stop System. This technology is new for TSS 3.0 and is designed to monitor the driver’s attention. If the driver’s eyes are not on the road ahead and no inputs have been detected for some time, audible warnings will be sounded. If the driver fails to respond to these alerts, the system will bring the vehicle to a gradual stop while keeping it safely in lane. Hazard lights are activated to warn other road users, and doors are unlocked to allow emergency services easy access if required.
Figures released in July 2025 revealed that the number of vehicles equipped with TSS had now reached 56 million globally. The system is available in 144 countries and regions.
Please note that the features listed above are not exhaustive.
The availability of some features may vary depending on country, vehicle model and grade.
The systems function within operational conditions and its limitations.
Drivers are always responsible for their own safe driving.
How can I tell which Toyota Safety Sense generation is in my car?
As a general rule, the original Toyota Safety Sense system was available in new cars launched and built between 2015 and 2018. The second generation system came online from 2018 onwards, with mild updates applied between 2019 and 2021. Similarly, the current, third generation of TSS became available in new cars launched and built from 2023 onwards.
Always refer to the owner’s manual for information on your car’s precise specification.
Can Toyota Safety Sense be retro-fitted?
Toyota Safety Sense technologies cannot at present be retro-fitted to Toyota vehicles. Similarly, it is not possible to upgrade a vehicle from an earlier generation to a newer generation of TSS
Further safety-related articles:
Tyre check: road safety begins at ground level
Total Human Model for Safety: What is THUMS?
Don’t slip up: Autumn driving safety tips
