Year

Total Mileage

Rural Roads

Surfaced Mileage

(1,000 miles)

(1,000 miles)

(1,000 miles)

1921

3,160

2,925

387

1922

3,196

2,960

412

1923

3,233

2,966

439

1924

3,243

3,004

472

1925

3,246

3,006

521

1926

3,242

3,000

550

1927

3,257

3,013

589

1928

3,262

3,016

626

1929

3,272

3,024

662

1930

3,259

3,009

694

1931

3,291

3,036

930

1932

3,296

3,040

879

1933

3,286

3,029

914

1934

3,309

3,034

992

1935

3,310

3,032

1,080

1936

3,267

2,920

1,175

1937

3,245

2,894

1,232

1938

3,257

2,898

1,276

1939

3,274

2,913

1,318

1940

3,287

2,920

1,367

1941

3,309

2,926

1,608

1942

3,309

2,925

1,630

1943

3,311

2,930

1,646

1944

3,311

2,932

1,655

1945

3,319

2,939

1,721

1946

3,316

2,934

1,730

1947

3,326

2,933

1,780

1948

3,323

2,929

1,815

1949

3,322

2,934

1,865

1950

3,313

2,922

1,939

1951

3,326

2,925

1,998

1952

3,343

2,925

2,070

1953

3,366

2,925

2,160

1954

3,395

2,941

2,228

1955

3,418

2,954

2,273

1956

3,430

2,945

2,323

1957

3,453

2,952

2,371

1958

3,479

2,959

2,448

1959

3,511

2,974

2,503

1960

3,546

2,989

2,557

1961

3,573

2,995

2,588

1962

3,600

3,005

2,647

1963

3,620

3,002

2,693

1964

3,644

3,003

2,730

1965

3,690

3,009

2,776

1966

3,698

3,188

2,800

1967

3,705

3,184

2,827

1968

3,684

3,152

2,870

1969

3,710

3,162

2,914

1970

3,730

3,169

2,946