CN Flint Sub Train Symbols

[CSXBOY]

So I have been railfanning this line a lot in the past couple years. I noticed some new strange symbols like M301, M302 and Q121 as of October 2021. I am probably way behind. If anyone can clarify, do these train symbols look right? I believe this was like this in the summer. Help would be appreciated
Thank you

Intermodal
CN Z148 Homewood IL to Montreal QC works Flint Daily
CN Z149 Montreal QC to Homewood IL works Flint Daily
CN Q116 Chicago IL to Flat Rock MI Intermodal/autos. Sets out intermodal in Moterm Daily
CN Q119 Ferndale MI to Chicago, IL as needed intermodal only runs a few times a year
CN Q123 Toronto ON to Vancouver ON Reroute intermodal
mixed freight
CN M394: Gary IN to Toronto, ON Daily
CN M396 Memphis TN to Toronto ON Daily mixed freight
CN M397 Toronto ON to Gary, IN Daily
CN M399 Toronto ON to Salem IL Daily
CN A491 Sarnia ON to Gary IN Works Flint and Battle Creek Daily
CN A492 Gary IN to Sarnia ON Works Flint and Battle Creek Daily
CN A450 Battle Creek MI to Flat Rock MI Daily
CN X401 Flat Rock MI to Battle Creek MI couple times a month
Autos
CN E251 Flat Rock MI to Gibson IN works Battle Creek MI Daily
CN E274 Chicago IL to Toronto ON 6-7x a week
CN E275 Toronto ON to Chicago IL 6-7x a week
CN E276 Chicago IL to Toronto ON as needed
CN E280 Chicago IL to Flat Rock as needed
Locals and misc
CN L500 Battle Creek MI to Flint MI Works Durand and Lansing Daily
CN L501 Flint MI to Battle Creek MI Works Lansing and occasionally Durand Daily
CN L514 Flint MI to Ferndale MI Daily intermodal turn
CN C711 Lansing MI to Chicago IL coal empties few times a month
CN C712 Chicago IL to Lansing MI Coal loads few times a month
CN X319 Toronto ON to Chicago, IL. Seasonal windmill loads
CN X318 Chicago IL to Toronto ON. Seasonal windmill empties
CN S756 Chicago IL to Toledo OH Seasonal sand loads

Does this seem right? Am I missing some stuff? Help would be nice

[MQT1223]

I've been seeing a 301 recently on the Durand cam, at least someone has been calling it that. Maybe another local?

[GreatLakesRailfan]

There was a thread on this a couple months ago, http://railroadfan.com/phpbb/viewtopic.php?f=3&t=37697. There has been discussion about the symbol changes here recently- I think.

I thought the 500 series locals were mostly annulled, at least on the east end of the Flint Sub. M301 is a relatively new symbol. It's a replacement for something, perhaps 501?

I thought 148 and 149 had been changed as well, specifically the originating point. They used to be overnight/early morning trains through Port Huron, but I've been seeing one of the really long double stack trains in Port Huron (from the freeway overpass) midday pretty frequently lately- I don't think ice in Canada is causing delays this time of year, like it was when I'd see these trains in the middle of the day in the past.

[CSXBOY]

I've been seeing a 301 recently on the Durand cam, at least someone has been calling it that. Maybe another local?

Wondering if this is a new train or a reroute. I have been seeing M302 a lot as well

[LansingRailFan]

M301 is MacMillan Yard to Winnipeg, MB - mixed freight
M302 is the counterpart and usually features a lot of loaded lumber racks as well as
Q120/Q121 are intermodals to/fro Halifax, NS to Markham, IL I believe but it could be to points further west too.

We started getting 301/2 this summer w some major work on the shield rerouted some trains our way. They seem to be keeping 301/2 our way about 5-6 days a week.

We usually see 1 or 2 120/121s a week since reroutes earlier this summer.

Other rerouted trains we saw were M348, B731, Q123

I’m calling the symbols out in the Train Updates post so feel free to ask me what they are.

I’ll confirm the Q120/1 and edit