[to3m]

My car has cruise control with brake functionality. Not sure if I've ever seen it actually do it - I only really use cruise control on the motorway, where I expect wind resistance is a major factor - but apparently it will apply the brakes to maintain the set speed when necessary.

At town speeds I would expect it to use the brakes a lot more readily. At 30mph in 3rd (2000rpm) or 4th (1500rpm) there's not really all that much engine braking, and wind resistance won't slow it much either.

(Mine is a 2010 model, but I think this stuff was introduced in 2004-6, something like that... it's not exactly new technology.)