What is another word for cross ties?
Pronunciation: [kɹˈɒs tˈa͡ɪz] (IPA) 
Cross ties, also known as railroad ties or sleepers, are the rectangular pieces of wood or concrete that are used to support and secure rails in a railroad track. While cross ties are the most commonly used term, there are a few other synonyms for this important component of the railway system. In some parts of the world, they may be called "railway sleepers" or simply "sleepers." In the United Kingdom, they may also be referred to as "timber ties," while Australia and New Zealand call them "sleeper blocks." Regardless of the term used, these components provide essential structural support to ensure safe and efficient train travel.
