What is the difference between a screed paver and a fixed-form paver?

A concrete screed paver uses an adjustable, vibrating screed beam to spread and level concrete to the desired width and thickness, suiting projects where the paving width or profile varies. A fixed-form paver instead rides along rails or forms set precisely to the final pavement geometry, producing a highly consistent, repeatable profile - the better choice for long, uniform runs like highway pavement or canal lining.