A support element for a modular transport plane with a plurality of transport module units each comprising a driving surface assembly is presented. The support element has an upper support surface supporting the driving surface assemblies of at least two neighboring transport module units. The upper support surface has driving surface assembly interfaces engaged with complementary interfaces of the supported driving surface assemblies. The support element comprises a lower part having a mounting structure and an upper part having the upper support surface. The upper part connects lengthwise to the lower part via a connection structure. The connection structure restrains a relative movement between the lower part and the upper part in the longitudinal direction of the support element and allows a limited relative movement between the lower part and the upper part in a plane perpendicular to the longitudinal direction of the support element.