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How Google's autonomous car navigates city streets

Google's self-driving car has been on the road for five years now, at various levels of autonomy. From the ease and relative serenity of California's arrow-straight highways, the car drove hundreds of thousands of miles with a greater level of concentration and mastery than the wandering attention spans of humans could accomplish. In 2012, Google shifted from the freeways to the cities, navigating a far more convoluted set of challenges: the slow-speed chaos that comes with any city, any suburb, any place with people and cars in it.

All used up: Pre-owned sales rise as consumers seek new-car alternatives

Used-car sales took a leap upward in April, and the trend is expected to continue at least until midyear as pent-up demand for affordable pre-owned vehicles jacks up at least one segment of the car marketplace. Sales of new cars continued an unabated slide toward what analysts say is a 30-year low in the United States, but used-car sales showed strength as buyers unable to finance new cars shifted their sights to less expensive used models. As a result, retailers such as the large Penske Automotive Group reported that despite an overall decline in sales in the first three months of 2009, improving used-car sales kept them in the black.

News watch April 2011: today's auto industry news

Come to CAR Magazine's news aggregator as we round up the daily stories in the auto industry. Top tip: news summaries are added from the top hour-by-hourFriday 28 April 2011• Due to UK royal wedding national public holidays, CAR Online news coverage will be reduced until CAR reopens on Tuesday 3 May (CAR)• The Saab financial situation continues to develop. Both the Swedish National Debt Office and General Motors are said to have given their approval for the proposed lease-back sale of Saab property to investor Vladimir Antonov.