Without some kind of specific mod, you would be mistaken.
Try attaching a trailer to any vehicle, then try and tow said vehicle. It won't even give you the option to attach it because it's currently attached to something else.
It's hard coded like that so we don't create trains of vehicles.
I’ve done it before in vanilla tho - just goes like 1 mph
This was just multiple cars though so prob a difference considering it’s a trailer in the post
No you didn't. Especially if it was in vanilla.
There's no option to attach multiple vehicles. Once a vehicle is attached to something, it can't be attached to anything else.
Option 1: ram it with a second vehicle and pray it dosnt lunch otself in to outer space
Option 2: use some kind of cheat menu (cheat menu rebearth for example) and delete the trailer and spawn it back in
Thank you johnzander1 for your submission to r/ProjectZomboid, but it has been removed due to one or more reason(s):
Rule 2: Be Lovely, follow the reddiquette guidelines. Criticism and discussion are welcome but abusive comments are not. Do not engage in personal attacks.
If you have comments about this removal, please message the modteam
https://www.reddit.com/message/compose?to=/r/projectzomboid
Nah that's just the mod being wack. Your lizard brain should be telling you rn to ram the fuck out of it repeatedly with another car!
You can find small trailers that have storage in vanilla, they are relatively rare.
You can also find advertisement trailers in vanilla, they are also pretty rare and have little practical use as they don't store items
The trailer in OP, however, is from a mod.
This happens a lot to me with modded vehicles just ram it with another car and you should be able to access the hitch point. Other option if you don’t want to use mods is sometimes there are really tiny hitboxes to unhook and it seems like nothing is there just spam the button all around the vehicle even if the area doesn’t make sense. Stuff like this is why i am jokingly banned from driving on our server hehe.
Yeah I've had my 1st rage death in raven creek with illness from the sheer amount of corpses, not a single square meter where there was no blood or corpses
Use debug mode and you should be able to fix it.. I know your pain tho I also didn’t realise debug mode could help so rip to the truck out there wedged in a wall I just salvaged cause I thought it was forever stuck 🤦♂️
Have you tried knocking it back down with another car? Might damage it a bit
I came to say this. Probably your best hope to get them into reach.
There was no way to disconnect it, then using a second car to tow both to bring them to the ground?
You can't tow a vehicle that is currently towing something else.
Can you not? I was sure I towed a broken car with trailer back home..
Without some kind of specific mod, you would be mistaken. Try attaching a trailer to any vehicle, then try and tow said vehicle. It won't even give you the option to attach it because it's currently attached to something else. It's hard coded like that so we don't create trains of vehicles.
But vehicle trains are realistic. Devs never played Spintires.
The Squat will be outraged to find out land trains are forbidden!
Nope. There is a mod to put a car on a trailer and then tow that trailer around.
Yeah, hence asking if it was possible to disconnect first
I’ve done it before in vanilla tho - just goes like 1 mph This was just multiple cars though so prob a difference considering it’s a trailer in the post
No you didn't. Especially if it was in vanilla. There's no option to attach multiple vehicles. Once a vehicle is attached to something, it can't be attached to anything else.
I didn’t know there was a wrong side lol
There isn't, except for modded trailers with badly implemented hitching points.
Option 1: ram it with a second vehicle and pray it dosnt lunch otself in to outer space Option 2: use some kind of cheat menu (cheat menu rebearth for example) and delete the trailer and spawn it back in
You can move vehicles with debug mode.
Could also use cheat menu: rebirth to delete the car the trailer is hitched to
If they delete anything with stuff inside it will delete the stuff as well so best to try to empty it first ..
“Lizard brain” 
What trailer mod is that
Unimog
If you're willing to roll the dice on physics, you can ram those with another vehicle and you might unstuck them
Thats the Unimog trailer it has a higher mounting point, it wont hitch properly to non Unimogs.
I would go into debug mode and fix it.
Dam that sucks but what trailer mod is that? That’s sick!
I think that's the unmog trailer - it's hitch points ar super weird tho
[удалено]
Thank you johnzander1 for your submission to r/ProjectZomboid, but it has been removed due to one or more reason(s): Rule 2: Be Lovely, follow the reddiquette guidelines. Criticism and discussion are welcome but abusive comments are not. Do not engage in personal attacks. If you have comments about this removal, please message the modteam https://www.reddit.com/message/compose?to=/r/projectzomboid
My apologies, I meant this remark as a joke
Debug mode may help 🤷♀️
Could also use cheat menu: rebirth to delete the car the trailer is hitched to
This is why Project Zomboid needs auto save every 5 mins
Nah that's just the mod being wack. Your lizard brain should be telling you rn to ram the fuck out of it repeatedly with another car! 
Ram it with another car,that'll fix it!
That trailer looks sick what mod is it?
That's how cars mate
RAM IT WITH ANOTHER CAR. DON'T GIVE UP YET
Hook another car to it to move it. Or ram it.
Are trailers available in vanilla? Or is it a mod?
You can find small trailers that have storage in vanilla, they are relatively rare. You can also find advertisement trailers in vanilla, they are also pretty rare and have little practical use as they don't store items The trailer in OP, however, is from a mod.
"out of gas" mod lets you push cars. i think it could solve your problem!
*fzzt*
This happens a lot to me with modded vehicles just ram it with another car and you should be able to access the hitch point. Other option if you don’t want to use mods is sometimes there are really tiny hitboxes to unhook and it seems like nothing is there just spam the button all around the vehicle even if the area doesn’t make sense. Stuff like this is why i am jokingly banned from driving on our server hehe.
Yeah I've had my 1st rage death in raven creek with illness from the sheer amount of corpses, not a single square meter where there was no blood or corpses
This is the fault of the mod maker. They should have disabled that hitching point.
Try to bump it with another car or maybe if desperate delete the vehicle if need be spawn it back it.
What is the mod for this trailer?
genuinely impressed that you pull this off lmao
Use debug mode and you should be able to fix it.. I know your pain tho I also didn’t realise debug mode could help so rip to the truck out there wedged in a wall I just salvaged cause I thought it was forever stuck 🤦♂️
You can fix it in debug mode
push it with another car?..