added date that canal was opened

a single railroad track

extended railroad

corrected road dates

correct dates (again)

changed dates, added roads

added jefferson city

added roads in alton

added roads

added highways, added roads

added start and end date for Dubris, added Dover and its approximant start date

added more roads

added roads, edited some starting dates

forgot to add a date

created new roads

added even more roads

added more roads

added a train track

changed dates

changed dates