The accident occurred in London Road near the roundabout of Stonehouse corner around 10.15 pm yesterday (April 24).
A 17 -year -old boy died in the place and an 18 -year -old man from Rainham was arrested on suspicion of causing death for driving dangerous and is in custody.
The road was closed during the night, but now it is open again.
A Essex police spokesman said: “Now we are appealing to drivers in the area at the time of the collision to get in touch, particularly with Dashcam’s images, to support our surfaces.
“You can let us know by sending a report on our website or using our online live chat service that is available 24 hours a day, seven days a week.
“It can be found in the lower right of our home page at www.essex.police.uk.
“Visit www.essex.police.uk/digital101 for more reporting services from our websites.
“Alternatively, you can call us 101. In an emergency, I always call 999.
“If you want to make an anonymous report, you can communicate with the independence beneficial organization Crimetoppers, visiting your website or calling 0800 555 111”.
