WASHINGTON (AP) — Officials say Washington taxicabs will charge an additional $15 during the snow storm.

District of Columbia Taxicab Commission spokesman Neville Waters says the “snow emergency fare” will go into effect Friday at 9:30 a.m. and lasts until Monday at 9:30 a.m.

Waters says the $15 will be in addition to the regular metered charge. The taxi commission says the extra fee was added to encourage some taxis to remain in service during the storm.

According to Washington municipal regulations, a snow emergency fare period can be put into place when there are hazardous driving conditions, such as significant accumulation of snow on the streets.

Waters said possible fare extensions will be reviewed Friday, and determined by weather conditions.