In an apparent effort to reach out to residents unhappy with Caltrans’ work last summer, the agency on Tuesday night will hold an information meeting in Middletown to explain two road projects being done this summer.

One project — flashing warning lights on Highway 29 at Hartmann Road in Hidden Valley Lake — already is under way. The second — the repaving of Highway 29 and 175 — is due to begin later this summer.

It’s that repaving work that Caltrans is hoping will smooth out its relationship with south Lake County residents who last summer were outraged over chip sealing of 175 and 29 that left stretches of both highways rough. More than 1,000 residents signed petitions demanding Caltrans fix the roads, and local politicians added their pressure to agency officials.

Highway 175 will be repaved from 4.9 miles east of the Mendocino-Lake line to Highway 29 and from near Kelseyville to Middletown. Highway 29 will be repaved from south of Middletown to Hidden Valley Lake. Those stretches will cost about $13.3 million to repave.

Caltrans had hoped last summer’s chip sealing would take care of the highways for several years. But the problem occurred when Caltrans, in a departure from its usual practice, used half-inch rock rather than the typical three-eighths-inch rock for the chip seal. That left the highways, in some ways, harder to drive on than before.

Tuesday’s meeting will be 6 to 8 p.m. at the Calpine Geothermal Visitor Center on Highway 29 in Middletown.