What were the advantages for the colonies of BNA of an intercolonial railway?

The intercolonial railway offered several advantages for the colonies of British North America (BNA), including improved transportation and communication, which facilitated trade and economic growth. It helped to connect the various provinces, fostering a sense of unity and encouraging migration and settlement in less populated areas. Additionally, the railway provided a strategic advantage for defense and military mobilization, enhancing security against potential threats. Overall, it played a crucial role in the development and integration of the BNA colonies.