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In upland areas, with higher rainfall and more difficult terrain, it is quite usual to find the ditches next to the agger to assist with drainage. Since the ditches were often (but not always) quite shallow, termed 'scoop ditches' by archaeologists, further road material was frequently sourced from quarry pits close to the road, which can often form long lines, or merge to form what is in effect a quarry ditch. Only rarely was material brought in from a distance. This use of local materials, especially on military roads (viae militares), means

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