Vinod Khosla: Hybrid-electric cars won't make a difference

This is a forum for unique thinkers so I'm putting this out here. The price of cars and gas is insane. But also, the price of building and maintaining roads is mind-blowingly high.

What if we built a track system, like a single rail roller coaster. The single rail would be fairly cheap to make, take up minimal space, eliminate the need for everyone to have their own cars, intersections, speed limits, snow plows, collisions, gasoline, human drivers, traffic, etc.

I think it would be an awesome solution all around. There would probably need to be some significant engineering behind designing that single track system that allowed so much track hopping and to handle cars smart enough not navigate the web. But I think its nothing we can't do with current technology.

Is this stupid? Most non-tech people seem to think so.

A great point, but it is perhaps already economically viable on a small scale, if done correctly.

Consider a place like Manhattan. Getting around in a car is already extremely impractical. Because it's easy to suspend a rail in the air, compared to a traditional road, it could be built right over the existing infrastructure. Population density is high, so you don't have to build very much of it before it becomes convenient. And few people in Manhattan would care that they can't get to rural Texas in their sky-car.

Now, if you supply electricity through that rail, it makes the cars much easier and cheaper to make. They would also be much lighter, which means the rail itself doesn't have to be as strong and so can be cheaper to build. And they would be more compact, which means people won't pay as much for a parking space.

Can somebody give me half a billion dollars, I have an idea for a startup...

I agree that hybrids are a sorry excuse for a "green" alternative. Aside from the fact that they currently cost more as Khosla points out -- just because a car or SUV is a hybrid, doesn't make it truly energy efficient. Auto makers are slapping hybrid engines in cars to appeal to the growing buzz about going green, when in fact, many of the hybrids out there are only a very dull shade of green.

Take the Ford Escape hybrid, for example. It's currently considered the most efficient SUV on the market ... getting a whopping 30mpg. 30mpg! Big friggin deal! You can get better mileage in a regular gasoline Civic.

The worst part about hybrids is that THEY STILL USE GASOLINE! Sure, maybe a little bit less, but as long as we are driving hybrids, we're still dependent on burning fossil fuels, contributing to CO2 in the atmosphere, and making the oil companies richer.

Hybrids are a marginal improvement in fuel efficiency. Marginal is not good enough to make any difference worldwide. We need to focus on orders of magnitude of increased efficiency. I believe that one day, hydrogen will be our answer. Solar electric is on a good path, too ... but still far from being feasible.

What can you do right now? Save your money on the fancy-shmancy hybrid, and buy a diesel car, and fill 'er up with biodiesel. It's carbon neutral, totally renewable, and requires no special modification to your car.

More like 20 billion. Light rail is rediculously expensive to build.

If the price of gas goes high enough (i.e. global peak oil with sharp declines like the North Sea), people will pay up front to lower gas consumption one way or the other. Even in Mississippi. That doesn't necessarily mean buying hybrids, but hybrids, especially plug in ones, seems like nice transition technology while another 'supply grid' of some sort develops.