Faster travel in the 1850s due to advancements in transportation infrastructure most benefited European immigrants by reducing travel time, increasing economic opportunities, facilitating land ownership, and improving communication.
Based on the information provided in the question, the group most likely to benefit from the changes depicted on the maps in the 1850s would be Immigrants from western Europe.
Here's why:
Reduced travel time: The maps show that travel times from New York City to various parts of the country significantly decreased in the 1850s. This made it easier and faster for immigrants from western Europe to reach their destinations in the United States, facilitating migration and settlement.
Increased economic opportunities: Faster travel facilitated trade and economic activity. This likely created more job opportunities in various sectors, which would have been attractive to newly arrived immigrants seeking employment and a better life.
Accessibility of land: The expansion of transportation networks, particularly railroads, opened up access to previously inaccessible land in the West. This provided opportunities for immigrants to acquire land and establish farms or businesses.
Improved communication and connection: Faster travel times allowed for improved communication and connection between different parts of the country. This would have been beneficial for immigrants wanting to stay in touch with family and friends back home or to connect with established communities of their countrymen in the United States.
While other groups might have also benefited from the changes to some extent, the advantages for immigrants from western Europe seem more substantial and direct.
Here's why the other options are less likely:
American Indians: The changes likely benefited American Indians only minimally, if at all. While some may have gained access to new markets for their goods or services, the expansion of transportation networks also facilitated the further displacement and dispossession of indigenous communities.
Mexicans in the southwestern US: The changes depicted primarily focused on the eastern and central parts of the country, having less direct impact on Mexicans in the southwestern United States. While there may have been some economic benefits, the expansion of American settlement into the southwest also led to conflict and land loss for the Mexican population.
African Americans: While the changes might have indirectly benefited some African Americans by creating new economic opportunities, the vast majority still faced significant discrimination and limited opportunities for advancement. Their overall situation wouldn't have drastically improved due to changes primarily benefitting white immigrants and westward expansion.
Therefore, considering the reduced travel times, increased economic opportunities, accessibility of land, and improved communication, Immigrants from western Europe are most likely the group that benefited significantly from the changes depicted on the maps in the 1850s.