English:
The major roads of Italy (going from Rome) are as follows, going clockwise from the left:

Green: Via Aurelia -> Via Aumelia Scaura -> Via Julia Augusta Bright green: Via Clodia
Yellow: Via Cassia
Blue: Via Flaminia
Grey: Via Salaria
Dark purple -> purple: Via Tiburtina -> Via Valeria
Carrot red: Via Latina
Bright red: Via Appia
Dark blue: Via Ostiensis

Additional major roads specified on the map:
Via Popilia, going to southern Italy (Rhegium) from Via Latina
and Via Appia crossroads. (cyan)
Via Traiana, branching from Via Appia and also going to Brundisium. (dark red)
Via Aemilia, starting from the end of Via Flaminia at Ariminum and going to Placentia. (orange)
Via Postumia, going from Genua (Genoa) on the northwest of Italy to Aquileia on the northeast. (dark green)
== Licensing ==

Public domainPublic domainfalsefalse

我，本作品著作权人，释出本作品至公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： 我无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

The data from this map was collected from pages 26, 27, 30, and 31 of the 1926 edition of the "Historical Atlas", by William R. Shepherd. The scans used to trace the paths were downloaded from the University of Texas Libraries at:
http://www.lib.utexas.edu/maps/historical/history_shepherd_1923.html

Specifically:
http://www.lib.utexas.edu/maps/historical/shepherd/italy_ancient_north.jpg
http://www.lib.utexas.edu/maps/historical/shepherd/italy_ancient_south.jpg

I cannot find the latest date these roads were all built in except to say that they were all extremely likely to have been built before 476AD, the ceremonial demise of the Western Roman Empire.

I could add the PNG background but I am as yet unsure how I would embed it in an svg.

Corrections and additions are welcome!