| http://upload.wikimedia.org/wikipedia/en/3/3b/CITSO_logo.png | 
| Info | 
|---|
| Locale | Chateauguay, Beauharnois, Kanawake, Léry, Salaberry-de-Valleyfield | 
|---|
| Transit type | Commuter and local buses | 
|---|
| Number of lines | 13 bus routes | 
|---|
| Daily ridership | 8000 (avg. weekday) | 
|---|
| Headquarters | 15 boulevard Maple, suite 200 Châteauguay, Qc
 J6J 3P7
 | 
|---|
| Operation | 
|---|
| Operator(s) | Transdev Limocar | 
|---|
The Conseil intermunicipal de transport de Sud-Ouest provides public transportation services for the towns Kahnawake, Chateauguay, Lery, Valleyfield and now Coteau-du-Lac. 
CITSO was previously under contract with Autobus Auger Metropolitain and Autobus Auger CAN National and in July, 2009 all Auger assets were sold to Transdev-Limocar. By the end of 2009 most vehicles have received a new livery, and fleet number. There are a handful of buses that still have one or several of their old fleet numbers visible inside and outside the vehicle. 
There are two buses presently that have a full body wrap, one used for The Chateauguay Junior Raiders (Football) and the other for The Chateauguay Patriots (Hockey).
Current Bus Routes
| Route Number | Route Destinations | Route Type | Major Stops | Remarks | 
| 1 |  | Regular | Terminus AngrignonCentre Regionale ChateauguayRue Dufferin - Valleyfield
 |  | 
| 1A |  | Rush Hour | Rue Rene-Levesque MontrealSt-Jean-Baptiste & St-FrancisCentre Regionale ChateauguayLeryBeauharnoisRue Dufferin - Valleyfield
 |  | 
| 20 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisSt-Francis & MapleSalaberry North & Higgins
 |  | 
| 21 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisAutoparc AMT ChateauguaySt-Jean-Baptiste & ParkviewParkview & St-JosephSalaberry Sud & De la Verdure
 |  | 
| 22 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisAutoparc AMT ChateauguayAlbert Einstein & St-MargueriteChopin & St-Jean-Baptiste
 |  | 
| 23 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisSt-Francis & MapleBourdon & PrincipaleHopital Anna-Laberge
 |  | 
| 24 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisAutoparc AMT ChateauguayCentre Regionale ChateauguayPrincipale & PrimeauGirouard & Youville
 |  | 
| 26 |  | Rush Hour | Notre-Dame & EdmourAnjou & Salaberry SudSalaberry Nord & GilmourSt-Francis & VanierCentre Regionale ChateauguayAutoparc AMT ChateauguayTerminus Angringon
 |  | 
| 27 |  | Rush Hour | Terminus AngrignonSt-Jean-Baptiste & St-FrancisSt-Francis & MapleMaple & GilmourEdmour & Vinet
 |  | 
| 28 |  | Rush Hour | Rue Rene-Levesque MontrealAutoparc AMT ChateauguayCentre Regionale ChateauguayAnjou & SalaberryPrincipale & Rene-Levesque
 |  | 
| 31 |  | Regular | Terminus AngrignonSt-Jean-Baptiste & St-FrancisAutoparc AMT ChateauguaySt-Jean Baptiste & ParkviewCentre Regionale ChateauguaySt-Francis & Maple
 | 
 | 
| 32 |  | Regular | Terminus AngrignonSt-Jean-Baptiste & St-FrancisSt-Francis & MapleCentre Regionale ChateauguayParkview & St-Jean-BaptisteAutoparc AMT Chateauguay
 |  | 
| 33 (Route A) |  | Regular | Centre Regionale ChateauguaySalaberry & De La VerdurePrincipale & YouvilleRene-Levesque & PrincipaleHopital Anna-LabergeRene-Levesque & Primeau
 |  | 
| 33 (Route B) |  | Regular | Centre Regionale ChateauguaySalaberry & De La VerdurePrincipale & YouvillePrincipale & BourdonHopital Anna-LabergeRene-Levesque & Primeau
 |  | 
All-Time Transdev CITSO Roster