SH-85 is one of the longest state highways, passing through eight districts in the state of Karnataka. It is one of the three highways (other two being NH-75 and NH-275/SH-88) connecting Bengaluru to Dakshina Kannada.
Under KSHIP-III (Karnataka State Highways Improvement Project), this highway is being expanded into a proper two-lane carriageway (with paved shoulders) from Somwarpet to Magadi and four-lane carriageway from Magadi to Bengaluru. [2]