Natalia Borodina, 35, was filmed hanging topless out of a window during a holiday in the Dominican Republic.
Police have now identified the road sign that killed Ms Borodina and detained her 32-year-old companion Ivanna Boirachuk, from Ukraine.
Tyre marks evidently show the dented red Kia Picanto car butted the yellow kerb at the moment of the tragic accident.
Ms Boirachuk used her mobile to film her friend letting her upper body hang out of the passenger side car window as they drove back from the beach near Punta Cana.
Ms Borodina playfully stuck her finger in her mouth and laughed at the camera, but within seconds, the video shows the impact.
She was rushed to hospital but died of severe injuries.
![This is the roadsign that killed Ms Boradina](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uVRs46ibqH7VzfF0dSx8vJnqxJ8UEiPhx7lN6zxznLiLRnVIs8q6YGkqUTPi5bwFOtf9MZGn9JcMW83YnhgktyNstDXsE_yitsoCaxApgKmeiIgvuPY-ZVyux3NBlODOjJ9ZCdhfNXReHHGn2xsdo6XeopCfwV7f-PBIAPdCBG=s0-d)
![High risk: The 35-year-old can be seen with her upper body hanging out of the passenger side](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uX3Uvcr7VwUeqCz7PjHl-W5-26MLNBTdQRXJXGHQ3M1r6_iYyW3Nke7Oo9XBRX7hM_CBndI3uHJh3eaWE-vsxwLDsow59KtCIxmILDRjGeqWB5_XV7LSEmWUCgqxpFeor9MVVolzR5oDDk5lGotQe-NQ6lBIFyeCy5iF-KVWifw8ZFxZrx=s0-d)
![The is the Kia car that Ms Borodina's friend was driving when she was killed](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vNTvn6T_hw8c9OywOqPxOJsxxJtFIYbqne7HWWLoC786hgtQzB3raDf9Z-JVumiEsIyDPdmTMaNYSI_f0oIbIjr8DhtYTlwPL8ddgBETGcL8_jZSJ3SY68X31SG0Ycy0WaeAuAeroM6zGBaEG_0sEexzZZELn2dp55sa-Mwy8D=s0-d)