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Traffic statistics of austrian federal highways
Interpreting results of a state-wide highway transport survey
Digest of Vermont highway transportation survey
Motor traffic on improved roads disproportionately high
A survey of Liverpool's road-traffic requirements
New traffic flow recorder for use in traffic surveys
Traffic count by boy scouts under auspices of engineering society
Traffic surveys valuable in planning and financing highway programs
History of determinations of the heights of mountains
Maryland aerial survey of highway traffic between Baltimore and Washington
Maryland aerial survey of highway traffic between Baltimore and Washington
Results of First German-Austrian Traffic Survey
Survey shows traffic hazards greatest in late afternoon