Where does Interstate 49 Start (Begin) and End

Where does Interstate 49

State Of Louisiana
St seh DTE Alexandria, Lafayette, Natchitoches, Shreveport
Summary today, Interstate 49 is not a proper Interstate, it does not leave the territory of the state at all. In the future, soch is supposed to change, is planned an extension to the North, probably through Arkansas up into Missouri. It is also planned to extend the road south to avoid New Orleans South.
L to NGE 209 miles or 336 km
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Where does 49 start and end?
Is I 49 north of Shreveport Open?
When was Hwy 49 built?
How old is Interstate 49?
What is i49?