The reason is that there is profit to be made by inefficiency.

When rail is used, the people who profit are;

• the sender
• the recipient
• the railway company
• the train drivers
• the community.

When Trucks are used, the people who profit are;

• the petrochemical companies
• politicians who receive contributions from Petrochemical companies
• vehicle manufacturers
• vehicle maintenance providers
• vehicle parts providers
• the trucking company
• politicians who receive contributions from trucking magnates.
• road maintenance and construction companies.
• politicians who receive contributions from the construction industry.

These are all at the expense of;

• the sender
• the recipient
• the community
• other road users
• emergency services
• the poor truck driver who is high-as-kite on amphetamine in order to meet his outrageous deadline.