I tried Nissan's challenger to Tesla Autopilot - and it was a dream to use in traffic

Nissan is giving its Leaf a big upgrade in 2018 as the Chevy Bolt and Tesla Model 3 pose greater competition in the electric-vehicle market.

Aside from an expected longer range, the Leaf will be the first vehicle to feature Nissan's ProPilot Assist. As a level 2 self-driving system, it won't let you kick back and relax with your hands off the wheel. But it can take over on a highway, even handling incessant braking in stop-and-go traffic.

I recently got a sneak preview of the system on a Nissan Rogue prototype in New York City. Here's what it was like to use: