車をバックさせる掛け声「オライ」って何語？と外国人。
https://www.gunjix.com/entry/2021/11/25/210220
「オライ」と短縮して使うことが多い事もあり <--- frequently abbreviated

https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q115859806
私のいつものスタンドでは『オライ！オライ！』って、言ってました。

The cutest demonstration, as a minecraft boat is backed up, one player does the "beep beep beep" of a truck in reverse, and another echoes "オライ" "オライ" オライ" 
https://youtu.be/tFzctMMQBw4?t=237

Here's a less-cute, actual garbage truck:
https://youtu.be/jwbcOtjlohw?t=417
6:57 timestamp: "オレーーオレーー　　ストップ！"

17 second clip, "お" is barely pronounced at all:
https://www.youtube.com/watch?v=-OjGxQrg1kU

Here's quick tutorial on how to back up a vehicle. Term used repeatedly throughout. Pretty sure that's not a long vowel
https://www.youtube.com/shorts/PssT--EHwAQ

I was going to propose adding "オライ" as a visible form, hence all the research. But after looking at everything I think this is mostly a spoken phenomenon, and people shouldn't be encouraged to *write* it is this way.

Nonetheless, I "*heard* オライ and wanted to see if it was here, and couldn't find it.  You hear this all the time when a work truck or garbage truck is in reverse, and someone is guiding.  I don't think there is usually a long "o" at the beginning in this rhythmic "オライ オライ オライ" context. (オライ is repeated so long as the driver should continue in reverse).

I wouldn't mind オライ with a note, but we don't even do this on 雰囲気 (I might make a comment there...)

I'd note, I don't think the "it's safe to continue backing up" form is [int].

@@ -5,0 +6,4 @@
+</r_ele>
+<r_ele>
+<reb>オライ</reb>
+<re_inf>&sk;</re_inf>

based on daijirin's definition, I think this works.

@@ -11,0 +12 @@
+<gloss>I've got it</gloss>

GG5, 中辞典, etc.

I think it's general. Best kept as 1 sense.