Unit prices have been estimated to range between $0.10 and $1.20 per linear foot (about $500 to $6000 per mile). In general, contracts where rumble strip installation is the primary item are lower in unit cost than other contracts.owever, Montana DOT regularly chip seals and then mills rumble strips. Where the depth of the existing rumble strip is 5 â 8  (or greater), Montana DOT can perform the chip seal and not have to re-mill the rumble strips. Where existing rumble strip depth is 3 â 8  (or less), the DOT re-mills the rumble strips.
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