|Maintained by TxDOT|
|Length:||6.043 mi (9.725 km)|
|Existed:||1966 – present|
|West end:||FM 2499 in Flower Mound|
|Bus. SH 121-H in Lewisville|
|East end:||I-35E in Lewisville|
Route description 
FM 3040 begins at the intersection of FM 2499 and Flower Mound Road in Flower Mound. It travels eastward along Flower Mound Road, passing near the town's namesake, into Lewisville, where it is known as Round Grove Road. It crosses Bus. SH 121-H and passes Vista Ridge Mall before ending at I-35E exit #448B.
FM 3040 was first designated in 1966. Its original routing was from the current western terminus at FM 2499 eastward to what was then SH 121 (now the business route) in Lewisville. It was extended to Interstate 35E the following year.
As with many farm to market roads in urban areas, the official designation was changed to Urban Road 3040 (UR 3040) in 1995.
Major intersections 
The entire route is in Denton County.
|Flower Mound||0.0||0.0||FM 2499 (Long Prairie Rd.) – Grapevine, Highland Village||Western terminus; continues as Flower Mound Rd. under local jurisdiction|
|Lewisville||4.7||7.6||Bus. SH 121-H – Coppell|
|1.3||2.1||I-35E (Stemmons Fwy.) / US 77 – Dallas, Denton||Eastern terminus; continues as Hebron Pkwy. under local jurisdiction|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Transportation Planning and Programming Division. "Highway Designation File: Farm to Market Road No. 3040". Texas Department of Transportation. Retrieved 2011-10-03.
- Texas Department of Transportation (2010) (PDF). Texas County Map Book (Map). 1:120,000. Cartography by Transportation Planning and Programming Division (2010 ed.). p. 481. http://www.dot.state.tx.us/travel/countymapbook2006/Pages/481.pdf. Retrieved 2011-10-03.
- Transportation Planning and Programming Division. "Highway Designation File: Urban Road No. 3040". Texas Department of Transportation. Retrieved 2011-10-03.
- Google Inc. Google Maps – Overview map of Farm to Market Road 3040 Distances Between Interchanges (Map). Cartography by Google, Inc. http://maps.google.com/maps?saddr=Flower+Mound+Rd&daddr=Farm+to+Market+3040+E+to:E+Round+Grove+Rd&hl=en&ll=33.0078,-96.995029&spn=0.129847,0.264187&sll=33.007143,-96.969924&sspn=0.008116,0.016512&geocode=FZm_9wEdndA2-g%3BFbqX9wEd6f83-g%3BFe6l9wEdz1M4-g&vpsrc=6&mra=mi&mrsp=2&sz=17&t=m&z=13. Retrieved 2011-10-03.
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