Between the Sugar Tree exit 173 and Rolla city limits.
The Doolittle police officer sits any where along interstate 44. Usually in the median waiting for speeders through the Doolittle city limits. Both East and West bound lanes are observed for speeders and other violations. East bound watch when you enter Doolittle from Rolla and West bound watch from the Sugar Tree exit onward to the Rolla city limits on I-44.