Strada statale 4 dir

{{Short description|Italian state highway}}

{{Infobox road

| country = ITA

| terminus_a = Strada statale 4 Via Salaria at Passo Corese

| next_route = 5

| next_type = SS

| previous_dab = Strada statale 4 Via Salaria

| previous_route = 4

| previous_type = SS

| terminus_b = Provincial road SP 15/A Tiberina at Fiano Romano

| junction = Autostrada A1 at Fiano Romano

| established = 1964

| regions = Lazio

| length_notes =

| length_ref =

| length_km = 4.5

| maint = ANAS

| map =

| alternate_name =

| route = 4dir

| type = SS

| next_dab = Strada statale 5 Tiburtina Valeria

}}

Strada statale 4 Dir or SS 4 Dir or SS 4 Salaria Dir is a short Italian state highway, linking Strada statale 4 Via Salaria at Passo Corese to the A1 motorway at Fiano Romano.{{Cite web|title=ANAS regional roads and highway|url=https://www.stradeanas.it/it/le-strade/anas-regione|website=italian National Autonomous Roads Corporation ANAS}}

It is a dual carriageway highway long only {{convert|4.5|km|mi}}, made in 1964 and managed by ANAS. It is recognized as a road of national interest.Decree of President of the Council of Ministers 20 February 2018, Revisione delle reti stradali di interesse nazionale e regionale ricadenti nelle Regioni Abruzzo, Basilicata, Calabria, Campania, Lazio, Liguria, Marche, Molise, Puglia, Toscana e Umbria, published on laws gazetta n. 98, 28 February 2018