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Watch an Aventador, Viper and LFA play the songs of their people

Our friends at Road & Track recently stopped by Cars and Coffee in Irvine, California, with the 2013 SRT Viper and found themselves a place to park between a Lamborghini Aventador and a Lexus LFA. Those machines might as well be the three musketeers of ludicrous exhaust notes, and rather than keep those 24 raging cylinders muffled, R&T set about conducting an orchestra of internal combustion. On seeing these three lined up, we were more than prepared to call the Viper victorious when it came to tickling our ear drums, but the latest domestic V10 sounds down right civilized in this company.
If we're picking favorites, we have to say the LFA takes the cake. There's something about the noise of a street-legal V10 that can wrap it's tachometer all the way to 9,000 rpm that turns our knees to quivering dollops of jelly. Check out the clip below for a listen. We shouldn't need to tell you to get frisky with the volume.

Are you the Lexus GS F?

It's been a while since we've heard rumors of the fabled high-performance Lexus GS F, but thanks to our eager spy photographers, this looks to be our first real proof of the machine's existence. We don't have the usual brace of photos from all angles to work with this time around, our spies saying that every time Lexus' garage door opened, engineers jumped in front of the cameras to prevent the car from being photographed.
Even so, we have a pretty clear glimpse at some significant changes to this GS sedan, including the same staggered, quad-pipe exhaust found on the Lexus IS F. There's also an air diffuser panel nestled between the exhaust outlets, as well as a larger lip spoiler and unique wheels (matching those of the RC coupe) wrapped in high-performance tires.
Last time we heard rumors of the GS F's existence, sources predicted that the M5-fighting sedan would use a tuned version of Lexus' 5.0-liter V8, producing something like 465 horsepower. We have also heard that the automaker plans to reduce weight wherever possible, and that the final curb weight will be something like 3,700 pounds.

Toyota develops new pre-collision system with steering assist

A number of automakers are working on developing fully autonomous cars, but it looks like the groundwork for such technologies will likely show up first as semi-autonomous systems for both safety and convenience. Following recent announcements from Nissan and Ford in this area, Toyota has now released information for some of its advanced semi-autonomous technologies that could be offered in production cars over the next few years.
On the safety front, Toyota's new pre-collision system with pedestrian-avoidance steering assist is aimed at protecting the folks who aren't in the car. This system combines visual and audible alerts with automatic brake assist and automatic steering. If warnings don't get the driver to slow down, the brake assist kicks in if a collision is very likely, but if that is still not able to avoid the impending collision (and if there is enough room to do so), the car can automatically steer itself around the pedestrian. This sounds most beneficial for last-second dangers such as a person accidently stepping out into the road in front of a car. Toyota hopes to have this technology available to customers by 2015.
The Japanese automaker is also testing a suite of technologies called Automated Highway Driving Assist (AHDA). The key part of this is a new adaptive cruise control system that uses vehicle-to-vehicle (V2V) communications rather than a radar-based system. This cooperative-adaptive cruise control allows vehicles to communicate their acceleration and deceleration data with other cars, which Toyota says this helps to improve fuel efficiency and traffic flow. Also a part of AHDA is the Lane Trace Control feature, which sounds like a next-gen lane keep assist. This system uses cameras, radar and a computer to keep the vehicle in a "smooth driving line" by being able to change steering angle, engine torque and braking force. Toyota says this technology could be in place by the "mid-2010s."