This period has seen the evolution of the state’s three primary north-south corridors which historically provided the vital connection between the older southern/seacoast areas of the state and its northern regions. On the east side of the state, Routes 1A and 16 formed the eastern north-south route (“the Eastside Road”). Historically the southern part of this route provided access to New Hampshire’s first Turnpike, now Route 4, going between Portsmouth and Concord. In the center of the state, foot, boat, railroad, and later vehicular traffic followed the Merrimack River and its shores. This path eventually was to become the Daniel Webster Highway (Route 3) and later Interstate 93/ the Everett Turnpike. On the west side of the state, these same modes of travel were to follow the Connecticut River and its shores and were eventually to become part of the Dartmouth College Highway (Route 10). In addition to these, one of the state’s earliest and most important corridors goes northeast /southwest along the coastline. What eventually became the Route 1 and I-95 corridor moves traffic through the state between eastern seaboard states and across the Piscataqua River. Other east/west roads across the state which connect the major north/south corridors were historically given less emphasis and have proven to be bottlenecks over time. Eventually Route 101 and Interstate 89 filled these niches. Preservation Company has worked on all of New Hampshire’s travel corridors and has a deep understanding of the pattern and history of their evolution.