You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did speed limits start in the us?" whose answer is 1701.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did speed limits start in the us
Useful Output:

Doc 1: Speed limit laws in the United States started in 1901. Connecticut legislated a maximum speed of 12 mph in cities and 15 mph on country
Doc 2: In 1974, President Nixon agreed to a national speed limit of 55 mph for all states. This law actually had a beneficial effect on traffic
Doc 3: Connecticut was likely the first to enact speed limits at the dawn of the automotive age in 1901. But in the rugged West, both Nevada and
Doc 4: All limits were abolished in 1930 only for the urban 30 mph limit to be introduced in 1934. A 20 mph night limit in 1940 didn't stop 1941 being
Doc 5: Speed limits have been around in America since 1901, starting with Connecticut's law that allowed only 12 mph in cities and 15 mph on