Road Transport
A few examples of what you can ask Wolfram|Alpha about:
get information about an automobile model
compare automobile models
compare automobile trims
Vehicle Production
get data on vehicle production
compare vehicle production statistics
get gasoline price data
compute cost for a specified quantity of gas
compute fuel cost
get information about a car or light truck tire size
get information about a bicycle tire size
compare motorcycle tire sizes
Stopping Distance
compute stopping distance for a car
Roads
get data on road lengths for a given country
specify a road type
compare road data between countries
Road Transport Statistics
get data on road transport per country
get information about a highway
get specific data about a highway
get traffic information
Traffic
get traffic data for a specified country
specify a type of traffic
get traffic congestion data for a major US city
compare traffic for major US cities
Road Accidents
get data on road accidents
find road accident statistics for a specific year
compare road accident statistics between countries
get information about a bridge
do computations with bridge properties
get information about a tunnel
compare several tunnels