: Northern Arc), designated and signed as Federal Highway M40D, is a toll road in Mexico.

The highway has two lanes in each direction and begins northward through low mountains at 2,500 m (8,200 ft) above sea level.

As it reaches Tula, the area is greener and lies about 2,400 m (7,900 ft) above sea level.

Then it rises to about 2400 m and meets the Mexico-Querétaro toll road, where it ended upon the opening of its first phase of 169 kilometres (105 mi) in 2009.

A second phase of 54 kilometres (34 mi) opened two years later, extending the road west and south to Atlacomulco and the junction with Mexican Federal Highway 15D toward Guadalajara.