Arrêté fédéral du 21.03.1958 concernant l'initiative populaire pour l'amélioration du réseau routier (contre-projet)
Contre-projet
| Canton | Electeurs | Votants | % Particip. | Oui | Non | % Oui | % Non |
| Zurich | 258'659 | 164'277 | 63.51% | 138'494 | 21'116 | 86.8% | 13.2% |
| Berne | 253'764 | 66'238 | 26.10% | 58'880 | 6'891 | 89.5% | 10.5% |
| Lucerne | 68'864 | 23'647 | 34.34% | 18'896 | 4'509 | 80.7% | 19.3% |
| Uri | 8'689 | 4'291 | 49.38% | 3'237 | 794 | 80.3% | 19.7% |
| Schwyz | 21'055 | 8'496 | 40.35% | 4'152 | 4'283 | 49.2% | 50.8% |
| Obwald | 6'311 | 2'180 | 34.54% | 1'593 | 566 | 73.8% | 26.2% |
| Nidwald | 5'804 | 3'001 | 51.71% | 2'289 | 656 | 77.7% | 22.3% |
| Glaris | 10'773 | 5'483 | 50.90% | 4'360 | 1'021 | 81.0% | 19.0% |
| Zoug | 12'997 | 4'732 | 36.41% | 2'847 | 1'847 | 60.7% | 39.3% |
| Fribourg | 45'677 | 10'304 | 22.56% | 8'865 | 1'339 | 86.9% | 13.1% |
| Soleure | 54'952 | 22'391 | 40.75% | 15'468 | 5'854 | 72.5% | 27.5% |
| Bâle-Ville | 66'766 | 16'083 | 24.09% | 14'948 | 1'068 | 93.3% | 6.7% |
| Bâle-Campagne | 37'670 | 14'000 | 37.16% | 11'834 | 1'960 | 85.8% | 14.2% |
| Schaffhouse | 17'659 | 13'803 | 78.16% | 10'981 | 1'594 | 87.3% | 12.7% |
| Appenzell Rhodes-Ext. | 13'537 | 8'063 | 59.56% | 5'762 | 1'854 | 75.7% | 24.3% |
| Appenzell Rhodes-Int. | 3'596 | 1'390 | 38.65% | 1'188 | 185 | 86.5% | 13.5% |
| Saint-Gall | 86'704 | 52'112 | 60.10% | 42'214 | 7'930 | 84.2% | 15.8% |
| Grisons | 37'176 | 17'462 | 46.97% | 15'165 | 1'675 | 90.1% | 9.9% |
| Argovie | 93'605 | 70'325 | 75.13% | 51'624 | 15'105 | 77.4% | 22.6% |
| Thurgovie | 43'222 | 28'217 | 65.28% | 21'565 | 5'155 | 80.7% | 19.3% |
| Tessin | 50'220 | 8'678 | 17.28% | 8'038 | 519 | 93.9% | 6.1% |
| Vaud | 117'855 | 31'780 | 26.97% | 28'722 | 2'890 | 90.9% | 9.1% |
| Valais | 48'700 | 9'539 | 19.59% | 8'743 | 701 | 92.6% | 7.4% |
| Neuchâtel | 41'894 | 11'770 | 28.09% | 10'535 | 1'106 | 90.5% | 9.5% |
| Genève | 66'679 | 26'331 | 39.49% | 24'996 | 620 | 97.6% | 2.4% |
| Suisse | 1'472'828 | 624'593 | 42.41% | 515'396 | 91'238 | 85.0% | 15.0% |
