Suddenly Autonomous Cars on the Road to Level 5 Are Hitting Speed Bumps at Level 2

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24 August 2018
Donald Light

Anyone insuring automobiles is paying a lot of attention to the development of ADAS (Advanced Driver Assistance Systems) equipped vehicles and of fully autonomous vehicles.

Many of the underlying technolgies used in ADAS (e.g. cameras, radar, lidar, AI) will also be used in fully autonomous vehicles. However, the demands that a fully autonomous vehicle places on these technologies are quite different than the demands of an ADAS-equipped vehicle. ADAS-equipped vehicles will pass control to and from human drivers (or send warnings to human drivers) in various circumstances. Fully autonomous vehicles will have no hand-offs and no warnings since there are no human drivers to receive them.

The Insurance Institute for Highway Safety (IIHS) recently ran a series of tests of two key ADAS capabilities: Adaptive Cruise Control (ACC) and Active Lane Keeping. ACC maintains a set speed and a specified distance from a car in front of the car with ACC. Active Lane Keeping automatically maintains the car within its current lane.

Vehicles with using ACC and Active Lane Keeping are at Level 2 on the SAE International scale. This is a widely recognized framework demarcating degrees of autonomy -- ranging from Level 0 (no automation) to Level 5 (fully autonomous).

Source: NHTSA

Notice Level 2 is a long way from Level 5.

The IIHS tested five well regarded vehicles:

  • A 2017 BMW 5-series with “Driving Assistant Plus”
  • A 2017 Mercedes-Benz E Class with “Drive Pilot”
  • A 2018 Tesla Model 3 and a 2016 Model S with “Autopilot” (software versions 8.1 and 7.1, respectively)
  • A 2018 Volvo S90 with “Pilot Assist.”

The results of these tests were reported in IIHS and HLDI publication, Status Report (August 7, 2018). The entire report is well worth reading.

The results were not pretty.

  • In one test on a public roadway, the Mercedes was aware of a stationary vehicle in front of it, but then continued without reducing speed, until the human driver applied the brakes.
  • In an 180 mile test drive, the Tesla Model 3 slowed without an appropriate cause 12 times (including 7 instances of tree shadows on the road).
  • In testing the Active Lane Keeping capability on curves; the BMW, the Mercedes, and the Volvo were unable to stay in their lane without the driver providing additional steering assistance.
  • The vehicles’ Active Lane Keeping capability was also tested when they reached the top of hills. At the top, some cars’ technologies essentially lost sight of the lane markings on the road. The BMW failed to stay in its proper lane (without driver intervention) in all 14 tests. The Volvo stayed in the lane in 9 of 16 tests. The Tesla Model S swerved right and left as it attempted to locate the appropriate lane. Sometimes it also entered an adjacent lane or drove onto the shoulder.

It should be remembered that there is evidence that ADAS technologies do reduce accidents and insured losses – here and here.

However, the real world test results of Level 2 technology in these five highly regarded models were certainly disappointing. Level 2 autonomy requires the driver to remain engaged, and constantly monitor the environment. The key words are “remain engaged.” People, while driving, often do many things other than remaining engaged.


  • The shared responsibility between less than perfect humans and less than perfect technologies of Level 2; implies that either the technolgies have to become intrinsically better -- and/or they must find ways to compensate for imperfect humans

As mentioned, you cannot make a straight line projection of elapsed time from the current state of Level 2 ADAS technology to the arrival of ready-for-prime-time Level 5 fully autonomous technology.

More Conclusions

  • The availability of fully autonomous vehicles for individual consumers may be delayed beyond what some manufacturers and analysts have been saying.
  • If so, the downward pressure on insurance automobile losses will also be delayed – and insurers will have more years to adjust.


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Asia-Pacific, EMEA, LATAM, North America