The maximum speed limit on an interstate highway can vary depending on the state and specific roadway conditions. In the United States, speed limits are determined by individual states, and the maximum speed limit on interstates can vary from state to state.
the maximum speed limits on interstate highways typically range from 65 to 85 miles per hour (mph) (approximately 105 to 137 kilometers per hour). However, it's important to note that these limits are not universal and can be lower in certain areas due to factors such as urban congestion, construction zones, or specific safety considerations.
To get the accurate and up-to-date information about the maximum speed limit on a particular interstate highway, it is recommended to refer to the local traffic laws and regulations of the specific state or region you are interested in or consult the local Department of Transportation or relevant authorities.