Northern Utah road construction and improvement projects will receive more than $36 million in state and federal highway funds over the next 18 months, says a Utah Department of Transportation report.

More than $19 million will be spent to complete the final 13.8-mile stretch of Interstate 15 in Box Elder County between Tremonton and Plymouth, according to an updated work program approved recently by the Utah Transportation Commission.The remaining $17 million will go to highway rehabilitation, road construction, bridge replacement and traffic signal projects in Davis, Weber, Morgan and Box Elder counties, the commission says.

More than $25 million will be spent during the remainder of fiscal year 1989, and UDOT officials indicate several major projects - including four contracts to complete I-15 - will go out for bid by spring.

The other $11 million will be spent during fiscal 1990, including $3 million to widen and resurface Hill Field Road in Davis County between U.S. 89 and State Street in Clearfield.

UDOT spokesman Kim Morris said the 18-month plan is to meet northern Utah's most pressing needs, although some projects must be deferred until funding becomes available.

To complete the only unfinished portion of I-15 in Utah, UDOT engineers plan to put two contracts out for bid by spring. Each will call for paving and the construction of bridge structures on two 3.7-mile sections of new interstate.

The section from Tremonton to Garland will cost an estimated $7.6 million while the stretch from Belmont to Plymouth will cost an estimated $8.3 million.