Complex sentence: In the United States, the most common type of sidewalk consists of a poured concrete ribbon with cross-lying strain relief grooves at intervals of ~ 1 m; this is intended to minimize visible damage from tectonic and temperature fluctuations, both of which can crack longer segments.
Split into simpler sentences: In the United States, the most common type of sidewalk consists of a poured concrete ribbon with cross-lying strain relief grooves at intervals of. This is intended to minimize visible damage from tectonic and temperature fluctuations, both of which can crack longer segments.