Police were called just before 8am today to Southend Arterial Road in Wickford.
A cyclist was involved in a collision with a van near the Dick Turpin pub.
The cyclist, a 30-year-old man from Chadwell Heath, died at the scene.
The driver, a 42-year-old man from Kent, was arrested on suspicion of causing death by dangerous driving and is currently in custody for questioning.
The Southend-bound carriageway is currently closed and diversions are in place. Drivers are asked to avoid the area.
Witnesses or anyone who captured dash cam footage are asked to contact the Serious Collision Investigation Unit on 01245 240590 or email CollisionAppeal@essex.pnn.police.uk
Tags: Chadwell Heath