Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. M-19 is a state trunkline highway in the US state of Michigan. It begins northeast of Detroit at a junction with I-94 and runs northward to a junction with M-142 just east of Bad Axe in the thumb.M-19 begins at a junction with I-94 north of Detroit at exit 247. From there it runs parallel to I-94 until passing through the city of Richmond where it turns northward. Continuing north, beyond Richmond, M-19 travels through mostly rural areas and agricultural fields and continues as such, through the community of Memphis until its junction with I-69, at exit 184, about 15 miles (24 km) west of Port Huron.